Betting Glossary

A plain-English glossary of betting terms. Browse the key ideas behind odds, bet types, value, markets and bonuses — each explained simply.

Odds & Fundamentals

Action

Action is any wager you have riding on an outcome, and the status that determines whether a bet counts, pays, or gets voided.

Against the Spread (ATS)

Against the spread (ATS) measures a bettor's record on point-spread wagers rather than straight-up wins and losses.

Bad Beat

A bad beat is a wager that appears certain to win until a late, improbable turn of events flips the outcome against the bettor.

Cover

In point-spread betting, "cover" means a team beats the spread — winning by more than it was favored by, or losing by less (or winning outright) as an underdog.

Even Money

Even money is a bet priced at +100, where the payout on a win exactly equals the amount risked, no more, no less.

Favorite vs Underdog

Explains how sportsbooks label the favorite (minus odds, must win by more) and underdog (plus odds, extra cushion) and what that means for payouts.

Hook

The hook is the extra half-point tacked onto a spread or total (like -6.5 or 47.5) specifically so the bet can't end in a push.

Implied Probability

Implied probability converts betting odds into a percentage chance of winning, letting you compare a sportsbook's price to your own estimate of the true likelihood.

Juice / Vigorish (Vig)

Juice, or vigorish, is the built-in commission a sportsbook bakes into its odds that lets it profit no matter who wins.

Moneyline

A moneyline bet is a wager on which team wins a game outright, with odds set by each side's implied chance of winning.

No Action

A settlement where a sportsbook voids a wager and refunds the stake in full because the bet couldn't be fairly graded as a win or loss.

Odds Formats

Odds formats are the different ways a sportsbook displays a bet's price — American, decimal, and fractional — all describing the same payout.

Off the Board

"Off the board" means a sportsbook has pulled a game or market from betting, so no new wagers can be placed on it until odds are reposted.

Over/Under (Totals)

Over/Under (totals) is a bet on whether the combined final score of a game will land above or below a number set by the sportsbook.

Pick'em

A pick'em is a matchup with no point spread, priced instead through moneyline odds because neither team is favored by more than a hair.

Point Spread

A point spread is a handicap that adds or subtracts points from a team's final score so bettors can wager on the margin of victory, not just the winner.

Push

A push is a tie between the bettor and the sportsbook, where the wager is refunded in full because the result landed exactly on the number.

Straight Bet

A straight bet is a single wager on one outcome—like a spread, moneyline, or total—settled entirely on whether that one pick wins.

Bet Types

Asian Handicap

A soccer spread bet that adds or subtracts goals from a team's score, using lines that can fully or partially remove the draw as a result.

Cash Out

Cash Out lets a bettor settle a wager before the event ends, locking in a sportsbook-set payout instead of waiting on the final result.

Double Chance

Double chance combines two of three possible match outcomes (win, loss, draw) into one bet, trading a smaller payout for built-in draw insurance.

Futures Bet

A wager on a longer-term outcome, like a champion or award winner, that isn't settled until weeks or months after you place it.

Hedging

Hedging is placing a second bet against your original wager to lock in profit or limit losses regardless of the final outcome.

Live Betting (In-Play)

Live betting (in-play) lets you wager on a game already underway, with odds recalculated in real time as the score and clock change.

Parlay (Accumulator)

A parlay combines two or more bets into a single wager that pays out only if every leg wins, multiplying the odds — and the risk.

Player Prop vs Game Prop

Player props bet on an individual's stats; game props bet on an event or characteristic of the contest itself, not tied to one player or the final score.

Prop Bet (Proposition Bet)

A prop bet is a wager on a specific occurrence within a game — like a player's yardage total — that doesn't depend on which team wins.

Round Robin

A round robin splits a group of picks into every possible smaller parlay combination, so one losing leg doesn't wipe out the whole ticket.

Run Line / Puck Line

The run line (MLB) and puck line (NHL) apply a fixed 1.5-goal/run spread to baseball and hockey moneylines, shifting risk into the odds.

Same-Game Parlay

A same-game parlay bundles multiple bets from one game into a single wager, with sportsbook-adjusted odds that account for how the legs affect each other.

Teaser

A teaser is a parlay where a bettor shifts the point spread or total on every leg in their favor by a fixed number of points, in exchange for lower payout odds.

Value & Strategy

Arbitrage Betting

Arbitrage betting means covering every outcome of an event across different sportsbooks at odds that guarantee a profit no matter what happens.

Bankroll

Bankroll is the total money a bettor sets aside strictly for wagering, separate from personal funds, used to size bets and survive losing streaks.

Buying Points

Buying points means paying extra vig to move a point spread (or total) in your favor, most valuable when it lets you cross a key number like 3 or 7.

Closing Line Value (CLV)

Closing line value (CLV) measures whether the odds you bet were better than the odds available right before kickoff.

Edge

Edge is the measurable gap between the true probability of an outcome and the probability implied by the odds you're offered.

Expected Value (EV)

Expected value (EV) measures the average profit or loss a bet would produce if made many times, based on your win probability versus the odds offered.

Fade the Public (Contrarian Betting)

Fading the public means betting against the side taking the majority of tickets, on the theory that lopsided public money skews lines toward bad value.

Kelly Criterion

A bankroll-management formula that sizes each bet as a fraction of your bankroll based on your edge and the odds offered.

Key Numbers

The final-score margins—3 and 7 above all in football—that games land on so often that crossing them changes a bet's value dramatically.

Line Shopping

Line shopping is comparing a bet's odds and point spread across multiple sportsbooks to place it where the number and price are most favorable.

Matched Betting

Matched betting pairs opposing bets at two sportsbooks to cancel out risk, letting a bettor pocket sign-up bonuses and promos as near-guaranteed cash.

Middling

Middling is betting both sides of the same game at different lines so a specific final result wins both bets.

ROI (Return on Investment)

ROI is a bettor's net profit divided by everything they've wagered, expressed as a percentage — the standard measure of long-term betting performance.

Steam Move

A steam move is a fast, near-simultaneous odds shift across many sportsbooks, usually triggered by sharp money forcing books to react in unison.

Tout

A tout is a person or service that sells sports betting picks or predictions for a fee, claiming an edge or inside information.

Units

A unit is the fixed slice of a bettor's bankroll used to size every wager, letting results be tracked in relative rather than dollar terms.

Variance (in Betting)

Variance is the natural gap between a bettor's true long-run edge and the ups and downs of any actual sample of bets.

Market Terms

Betting Handle

Betting handle is the total dollar amount wagered on a game, market, or sportsbook over a given period, regardless of who wins.

Betting Limits

Betting limits are the maximum amounts a sportsbook allows on a single wager, varying by sport, market, and bettor.

Chalk

Chalk is betting slang for the favorite — especially a heavily favored side or outcome that draws the bulk of public money.

Line Movement

Line movement is the change in a posted odds or point spread between when a market opens and when it closes.

Oddsmaker / Bookmaker

An oddsmaker sets a sportsbook's lines and prices; the bookmaker is the business that takes the bets and carries the risk.

Opening Line / Closing Line

The opening line is a sportsbook's first posted odds on an event; the closing line is the final odds right before it starts.

Public Betting Percentage

The share of bets (by ticket count or dollar handle) placed on one side of a game, used to spot where the crowd — and sometimes the sharp money — is leaning.

Reverse Line Movement

Reverse line movement is when a betting line shifts against the side taking the most tickets, signaling that sharp money is on the other team.

Sharp vs Square

Sharp and square describe two types of bettors — informed pros whose money moves betting lines versus casual fans whose money rarely does.

Stale Line

A stale line is a posted odds price a sportsbook hasn't updated yet to reflect new information, leaving a short window of value for fast bettors.