Sports Betting Glossary: 100+ Terms Every Bettor Should Know

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

A

Accumulator

A type of parlay bet where two or more selections are combined and all must win for the bet to pay out. Also called a multi or combo bet. Accumulators also pay if any leg results in a push, which typically reduces the payout rather than voiding the whole ticket.

Action

The total amount of money wagered on any given game, match, or event — including all live bets placed during the event.

Across the Board

In horse racing, a single bet covering win, place, and show in one ticket. The bettor wins if their horse finishes in any of those three positions, with different payouts for each outcome.

AET Odds

After Extra Time odds — live betting lines posted when a soccer or hockey game goes to extra time or overtime. AET markets are most common in soccer, where draws can trigger extended play or a penalty shootout.

Also Ran

A competitor — athlete, horse, or team — that does not finish in a position where bettors receive a payout. Most common in horse racing contexts.

Alternate Lines

Point spreads or totals posted above or below the main line set by oddsmakers. Bettors can move the line in their favor by accepting higher juice, or accept worse odds to widen the margin.

American Odds

The standard odds format used in the United States, displayed as a positive or negative number relative to 100. A -110 line means you bet $110 to win $100; a +130 line means a $100 bet wins $130. Also called moneyline odds.

Ante-Post

Futures odds on horse or dog races posted one day — or more — before the event. Common for major events like the Triple Crown races. Ante-post bettors accept the risk that their selection may be scratched before race day.

Arbitrage

Placing bets on all possible outcomes of an event across multiple sportsbooks to guarantee a profit regardless of result. Also called arbing. Sportsbooks track and typically limit or close accounts that arbitrage consistently.

ATS / Against the Spread

A team’s record covering the point spread, distinct from their straight win-loss record. A team that is 8-4 ATS has covered the spread 8 times and failed to cover 4 times. ATS records matter more than win-loss records when evaluating spread betting opportunities.

B

Backdoor Cover

When a team scores late in a game to cover the spread without affecting who wins. Bettors on the winning side feel cheated; bettors on the losing team’s spread rejoice.

Bad Beat

A wager that appears likely to win but loses due to a late, unexpected result — a last-second score, a missed free throw, or a walk-off hit that flips the outcome. Common in all bet types but especially painful in totals and spread bets.

Bankroll

The total funds you have set aside specifically for betting. A well-managed bankroll grows as you win and shrinks as you lose. Most disciplined bettors risk 1-3% of their bankroll on any single wager.

Bankroll Management

The practice of controlling how much you wager relative to your total bankroll to survive losing streaks and stay in action long-term. Includes setting unit sizes, avoiding chase bets, and line shopping for better prices.

Beard

A person who places bets on behalf of another bettor who wants to conceal their identity — typically to avoid being flagged or limited by sportsbooks.

Bet

A wager placed with real money on the outcome of a sporting event. The bettor wins a payout at the stated odds if their prediction is correct; they lose their stake if wrong.

Betting Exchange

A platform that connects bettors directly to each other rather than to a traditional sportsbook. The exchange takes a small commission from winning bets rather than building vig into the odds, which can result in better prices for sophisticated bettors.

Book

Short for sportsbook — an online platform or retail location licensed to set odds, accept bets, and pay winners.

Bookmaker

A licensed individual or entity that sets odds, accepts wagers, and pays out on winning bets. Also called an oddsmaker or linemaker.

Buy Points

Paying extra juice to move a point spread or total in your favor. Each half-point purchased increases the vig attached to the bet. Most valuable when crossing key numbers like 3 and 7 in football.

C

Chalk

Slang for the favorite in a game or match. Betting the chalk means backing the expected winner.

Circled Game

A game flagged by the sportsbook due to uncertainty — an injury, weather concern, or roster question — where betting limits are lowered significantly below normal levels.

CLV (Closing Line Value)

The difference between the odds you received when placing a bet and the odds posted just before the event starts. Bettors who consistently beat the closing line are generally considered sharp, because it means they placed their bet before the market corrected against them. CLV is widely regarded as one of the strongest indicators of long-term profitability. See our sports betting strategies guide for how to use CLV in your approach.

Closing Line

The final odds posted by oddsmakers just before a game or event begins, after all pre-game line movement has settled.

Co-Favorite

A futures market situation where two or more competitors share the same shortest odds to win. Common early in a season when oddsmakers have limited information.

Commission

Another word for juice or vigorish — the sportsbook’s built-in margin on all bets. At standard -110 pricing, the commission is approximately 4.55% of the handle.

Correct Score

A bet type where you predict the exact final score of a game. Correct score bets are popular in soccer and typically pay large odds due to the difficulty of predicting the exact scoreline.

Cover the Spread

When a team wins by more than the point spread (for favorites) or loses by less than the spread or wins outright (for underdogs). Covering the spread is how spread bettors win their wagers regardless of the straight-up outcome.

D

Decimal Odds

An odds format common in Europe where the number represents the total return per dollar wagered, including the stake. 1.91 decimal odds equals -110 in American odds and returns $1.91 for every $1.00 bet, i.e., $0.91 profit.

Dime

A $1,000 wager. Common unit of measurement in professional betting circles. A “dime line” refers to a 10-cent spread between the vig on each side of a bet.

Dog

Short for underdog — the team or competitor expected to lose, shown with a positive number in the odds (e.g., +130).

Double Action

Also called an “if bet” — a two-part wager where winnings from the first bet are automatically applied to a second bet. If the first bet loses, the second bet is cancelled.

Double Bet

Placing twice your normal wager amount on a given line. Used when a bettor has extra conviction on a particular game or outcome.

Double Header

Two games between the same teams played on the same day, usually rescheduled after a rainout or postponement.

Double Result

A bet on both the halftime score and the final score of a game combined. Requires predicting the leader at half and who wins at the end.

Draw

A tied result. In moneyline markets that list draw as a separate outcome (common in soccer), a bet on either team loses if the game ends in a draw. In spread markets, a draw against the spread is called a push.

Drift

When odds lengthen (become less favorable) after opening — usually because public money is going the other way. A team’s moneyline can drift from -130 to -115 as betting volume pushes the market.

E

Edge

An advantage a bettor has over the sportsbook — gained through superior information, superior analysis, or finding odds that are better than the true probability of the outcome. All profitable betting strategies aim to identify and exploit edge.

Even Money

A bet where the profit equals the stake — a $100 bet at +100 (even money) returns $100 in profit. No favorite or underdog pricing applies.

Exotic Bets

Any bet that is not a moneyline, point spread, or over/under total. Includes parlays, prop bets, teasers, futures, and specialty markets.

Exposure

The maximum amount a bettor or sportsbook stands to lose on a given event. Sportsbooks manage exposure by adjusting lines when too much money is on one side.

EV / Expected Value

The average return you expect on a bet over many repetitions. Positive EV (+EV) means the bet is mathematically profitable long-term; negative EV means the house has the mathematical edge. A bet can be +EV and still lose — EV describes the long-run expectation, not any single outcome.

F

Fade

To bet against a team, player, or public consensus. “Fading the public” means taking the opposite side of where most public money is flowing — a strategy some bettors use when they believe the public is inflating a team’s line.

Favorite

The team or competitor expected to win a game or event. Favorites are shown with a negative number in American odds (e.g., -150) — the greater the negative number, the larger the favorite.

First-Half Bet

A wager on results that occur only during the first half of a game — including first-half moneylines, spreads, and totals. First-half bets settle at halftime regardless of the final game result.

Fixed Odds

Odds that are locked in when a bet is placed — even if the line moves before the event, the bettor retains the odds at the time of placement. Standard at most sportsbooks for pre-game wagers.

Fractional Odds

An odds format common in the United Kingdom, displayed as a ratio (e.g., 10/11). The numerator is the profit and the denominator is the stake: 10/11 means a $110 bet wins $100 in profit, equivalent to -110 American odds.

Future Betting

Wagers placed on events far in advance — championship outcomes, season win totals, award winners. Futures odds are posted early and typically carry high juice because your money is tied up for weeks or months before the bet settles, and the sportsbook needs to compensate for the extended uncertainty. Our futures betting guide covers how to find value in early lines and when to hedge a winning futures ticket.

G

Game Total Bet

An over/under bet on the combined points, runs, or goals scored in a single game. The bettor predicts whether the total will be over or under the number set by the oddsmaker.

Graded Bet

A bet that has been officially settled as a win, loss, or push by the sportsbook after the event concludes. Graded bets trigger payouts or deduct stakes from the bettor’s account.

H

Half-Time Bet

A wager placed at halftime that covers only the second half of a game. Oddsmakers post new lines at the break based on first-half performance and adjustments.

Handicap

A point or goal advantage given to the underdog to level the betting field. Synonymous with point spread in most American sportsbooks; also used in international betting markets for soccer and other sports.

Handle

The total amount of money wagered on a game, event, or across an entire sportsbook. Handle figures are publicly reported by state gaming commissions and are often used to gauge market interest.

Hedge

Placing a bet on the opposing side of an existing wager to guarantee a return regardless of outcome. Commonly used when a parlay or futures bet has reached a profitable position and the bettor wants to lock in some winnings.

Holding Your Own

Breaking even over a period of betting — winning approximately as much as you lose. Often used to describe a bettor who is not growing their bankroll but is not losing it either.

Hook

A half-point added to a spread or total to prevent a push. A team listed at -6.5 instead of -6 needs to win by 7 or more to cover — there is no possibility of a tie on the spread.

I

If Bet

A conditional two-part wager: if the first bet wins, the winnings are automatically placed on a second predetermined bet. If the first bet loses, the second bet is cancelled. Also called double action.

In-Play Betting

Another term for live betting — placing wagers while a game or event is in progress. Oddsmakers update lines rapidly as the action unfolds.

J

Juice

The sportsbook’s built-in commission on all bets, also called vigorish or vig. Standard juice is -110 on spread and totals bets, meaning you risk $110 to win $100. The vig is how sportsbooks profit regardless of which side wins.

K

Keep the Line

When a sportsbook holds the current odds or spread unchanged despite receiving heavy action on one side — typically because sharp money and public money are balancing each other out.

Kelly Criterion

A mathematical formula that determines the optimal bet size based on your perceived edge and current bankroll. The full Kelly tends to produce aggressive sizing; most disciplined bettors use a fractional Kelly (e.g., one-quarter Kelly) to reduce variance.

Key Number

A margin of victory that appears more frequently than others in final scores — 3 and 7 are the most important in NFL games because so many final margins fall on those numbers. Buying off or through a key number is often worth the extra juice.

Kicker

A small additional bet or stipulation added to a parlay or teaser, typically adjusting the odds slightly in exchange for a potentially higher payout if all components succeed.

L

Layoff

A late-stage wager placed on the opposing side of an open bet to reduce risk and guarantee some return. Similar to hedging, layoffs protect against a complete loss when a winning position is at risk.

Limit

The maximum amount a sportsbook will accept on a given game or market. Limits are lower for sharp bettors, certain sports, or circled games. Bettors can also set self-imposed limits as part of responsible bankroll management.

Linemaker

A person who creates and maintains betting lines at a sportsbook. Also called an oddsmaker or bookmaker.

Live Betting

Wagering on markets posted during the course of an active game — including live moneylines, spreads, totals, and prop bets. Lines update constantly based on real-time game action. See our live betting guide for in-play strategy and how to find the best live markets.

Longshot

A team or competitor with very long odds — a heavy underdog who is unlikely to win. Longshots carry large plus odds to compensate for the low probability.

M

Middle

Betting both sides of a point spread when the line moves — for example, backing the favorite at -3 and the underdog at +4. If the game lands at exactly 3 or 4 points, both sides win simultaneously.

Moneyline

A bet on which team or player wins outright — no spread involved. Making a moneyline bet means your selection simply needs to win the game. Favorites carry minus odds, underdogs carry plus odds.

N

Nap

A handicapper’s best bet of the day — the single wager they have the most confidence in from their daily card. Common in UK horse racing coverage.

Nickel

A $500 wager. Common unit of measurement in professional betting — half the size of a dime. A “nickel line” refers to a 5-cent spread between the vig on each side.

No Action

A cancelled bet where the sportsbook returns all original wagers — often triggered by a postponed game, a player withdrawal, or an event that cannot be completed.

Novelty Bets

Another term for exotic bets — any wager beyond standard moneylines, point spreads, and totals. Includes parlays, prop bets, teasers, and specialty markets.

O

Odds

The numerical expression of how much a bet pays — and implicitly, what probability the sportsbook assigns to each outcome. Odds can be displayed in American, decimal, or fractional format.

Odds Format

The three main styles for displaying odds: American (e.g., -110, +130), Decimal (e.g., 1.91, 2.30), and Fractional (e.g., 10/11, 13/10). American odds are standard in the U.S.; decimal is common in Europe; fractional is favored in the UK.

Oddsmaker

The person or team responsible for setting and updating betting lines at a sportsbook. Also called a bookmaker or linemaker.

Odds on Favorite

A team or competitor so heavily favored that bettors must risk more than they stand to win — for example, -200 or higher. Odds-on favorites offer low reward relative to risk.

Odds Shopping

Comparing odds across multiple sportsbooks before placing a bet to find the best available price. One of the simplest and most impactful edges available to recreational bettors.

Off the Board

A game for which a sportsbook has removed or suspended all betting lines — typically due to an injury, weather uncertainty, or late-breaking news. No new bets can be placed until the book re-opens the market.

Outright Betting

Betting on the winner of a game or tournament without a spread — equivalent to moneyline wagering in U.S. terminology. Common phrasing in UK and European betting.

Over Bet

A wager that the combined score of both teams will exceed the total posted by the oddsmaker. If the total is 47.5 and the teams combine for 48 or more points, the over bet wins.

Over/Under

Also called a total — a bet on whether the combined score of both teams will go over or under the number set by oddsmakers. Betting the over/under total means you are wagering on overall scoring, not on who wins the game.

P

Parlay

A single wager combining two or more individual bets (legs) where all legs must win for the bet to pay. Parlays offer higher payouts than individual bets but are harder to win because every leg must succeed. See our parlay betting guide for how payout math works and when parlays make sense.

Payout

The total amount a bettor receives upon winning — including the original stake plus the profit at the stated odds.

Pick’em

A game where neither team is favored — no spread is applied and both teams carry the same odds. Bettors simply choose a winner at even or near-even pricing.

Point Spread

A wager on the margin of victory rather than just the winner. The favorite must win by more than the spread; the underdog must lose by less or win outright. Most point spread bets are priced at -110 on both sides.

Price

The odds set by the sportsbook on a given market, including any juice applied. “Getting a good price” means securing odds more favorable than the true probability of the outcome.

Prop Bets

Short for proposition bets — wagers on specific in-game events rather than the final score. Examples include which player scores first, how many passing yards a quarterback throws for, or who wins the coin toss.

Public Money

The total amount wagered on a game by the general public — recreational bettors whose action typically follows popular teams and media narratives rather than sharp analysis.

Puck Line

The NHL equivalent of a point spread, fixed at 1.5 goals. The favored team must win by 2 or more goals to cover; the underdog covers by losing by 1 goal or winning outright. Puck line odds differ significantly from the straight moneyline on the same game.

Push

A tied result against the spread or total — when the final margin or score lands exactly on the posted number. All wagers are refunded and the sportsbook earns nothing on the bet. Sportsbooks often use half-point lines to prevent pushes.

Q

Quarter Bet

A wager on the results of a single quarter of a game — placed before the quarter starts or live as the quarter unfolds. Common in basketball and football, where scoring is broken into four distinct periods.

R

Recreational Betting

Casual, non-professional betting — placing wagers on major events for entertainment rather than income. Recreational bettors make up the majority of the public money in any given market.

Rotation Number

A unique numerical identifier assigned to each team or competitor at land-based sportsbooks. Bettors use the rotation number rather than the team name when placing a bet at the window to avoid confusion.

Run Line

The MLB equivalent of a point spread, fixed at 1.5 runs. The favored team must win by 2 or more runs to cover; the underdog covers by losing by 1 run or winning outright. Run line odds are adjusted from the moneyline to reflect the fixed 1.5-run margin.

S

Same-Game Parlay (SGP)

A parlay combining two or more legs from the same game — for example, a player prop and the game spread. SGPs offer higher payouts but legs within the same game often correlate, meaning one outcome affecting another can cause multiple legs to fail together. Our same-game parlay guide explains how correlation affects payouts and which leg combinations hold the most value.

Sell Points

Accepting a less favorable spread or total in exchange for reduced juice. The opposite of buying points — a bettor gives up margin in return for a better price on the bet.

Sharp

A professional or highly disciplined bettor who researches extensively, shops lines across multiple sportsbooks, and makes decisions based on data and analysis. Sportsbooks track sharp action closely because it is a reliable signal for line movement. The opposite of a square.

Special

An exotic or novelty bet offered on specific games or events beyond the standard moneyline, spread, and totals markets. Specials are often one-off markets tied to major events like the Super Bowl.

Spread Betting

Wagering on the point spread — laying the spread on the favorite or taking the spread on the underdog. The term is also used in financial markets to describe a different type of variable-payout betting.

Square

A casual or recreational bettor who follows public consensus and popular teams rather than sharp analysis. Squares typically bet with their heart rather than with data. The opposite of a sharp.

Stake

The amount of money wagered on a single bet. Winning bets return the original stake plus the profit at the stated odds. Losing bets forfeit the full stake. Pushes return the stake with no profit or loss.

Steam

Rapid, synchronized line movement across multiple sportsbooks, typically triggered by sharp bettors placing coordinated action on the same side. A steam move signals that professional money is heavily on one side.

Straight Bet

A single wager on one outcome — a moneyline, point spread, or total. No parlay, no combination. The simplest and most common type of sports bet.

T

Taking Points

Backing the underdog on the point spread — accepting the plus-points advantage. “Taking points” means your team can lose by a certain margin and your bet still wins.

Teaser

A modified parlay where you move the point spread or total in your favor by a fixed number of points — typically 6 in football, 4 in basketball — in exchange for a lower payout than a standard parlay. All legs must still win. Teasers are most valuable when the adjusted lines cross key numbers like 3 and 7 in the NFL.

Ticket

A receipt from a sportsbook confirming that a wager has been accepted. At retail sportsbooks, a physical ticket is printed; at online sportsbooks, tickets are logged digitally in the bettor’s account.

Tip

A betting suggestion or pick from a handicapper or analyst. Tips can inform your overall strategy but do not guarantee any outcome — treat every tip as one data point among many.

U

Under Bet

A wager that the combined score of both teams will fall below the total posted by the oddsmaker. If the total is 47.5 and the teams combine for 47 or fewer points, the under bet wins.

Underdog

The team or competitor expected to lose — shown with a positive number in American odds (e.g., +150). Betting the underdog pays more than betting the favorite for the same stake.

V

Vigorish

The full term for vig or juice — the sportsbook’s commission on all bets. At standard -110 pricing, you must wager $110 to win $100, with the extra $10 representing the book’s margin. Across millions of bets, vigorish generates consistent revenue for sportsbooks regardless of individual game outcomes.

W

Wager

A general term for any bet placed on a sporting event — straight bets, parlays, props, futures, or any other market.

Win Percentage

The percentage of bets a bettor wins over a given sample. At -110, a win percentage of 52.4% is the break-even threshold. Tracking win percentage by bet type and sport helps identify where your edge (or lack of it) actually lives.

Win Total

A futures bet on the total number of wins a team will achieve during a season. Bettors wager whether the team will win more (over) or fewer (under) games than the number set by oddsmakers.

Wiseguy

Slang for a sharp bettor or a well-connected professional who places large, well-researched wagers. Wiseguy money moves lines more than public money because sportsbooks recognize and respect it.

Wood

Slang for laying heavy odds on a favorite — e.g., wagering $200 to win $100. “Laying wood” means accepting an unfavorable price to bet a heavily favored side.

X

X-Factor

An unpredictable variable — a player, weather condition, or situational factor — that can heavily influence a game’s outcome and is difficult to price into the odds. Sharp bettors look for X-factors the market may not have fully accounted for.

Y

Yankee

A parlay-style bet consisting of 11 separate bets across four selections: 6 doubles, 4 trebles, and 1 four-fold accumulator. At least two selections must win for the bet to return a profit. Popular in UK horse racing.

Yield

A measure of betting profitability calculated by dividing total profit by total amount wagered, expressed as a percentage. A positive yield indicates a profitable strategy; negative yield indicates losses relative to total action.

Young Line

An early betting line released before public or sharp action has influenced it. Young lines often move significantly as information, injuries, and betting volume accumulate before game time.

Z

Zebra

Slang for referees or game officials — particularly in football, where the black-and-white striped uniforms resemble a zebra. Bettors sometimes discuss officiating tendencies when evaluating games with tight spreads.

Zero Juice

A rare sportsbook promotion where no vigorish is applied to a bet — both sides are priced at +100 instead of -110. Zero juice offers can significantly improve long-term profitability but are uncommon and often limited to new accounts or promotional periods.

Zig-Zag Theory

A betting strategy popular in the NBA and NHL playoffs that suggests teams are more likely to cover the spread after losing a game in a series. The theory rests on coaching adjustments, increased motivation, and home-court advantage in alternating-venue playoff formats.