Betting Glossary

New betting words tripping you up? This glossary explains the key terms — odds, bet types, value, markets and bonuses — in plain English.

Odds & Fundamentals

Action

Any bet placed on a sporting event; it also signals that a wager is live and valid.

Against the Spread (ATS)

A team's record judged against the point spread rather than by who simply won the game.

Bad Beat

A bet that looked like a sure winner but loses thanks to a last-minute or wildly unlikely event.

Cover

When a team beats the point spread, by winning by enough or keeping it close enough, it is said to have covered.

Even Money

A bet where your potential profit matches your stake exactly — decimal odds of 2.00, fractional 1/1, American +100.

Favorite vs Underdog

The favorite is expected to win (lower odds, shorter price), while the underdog is expected to lose (higher odds, longer price).

Hook

The half-point tacked onto a spread (like -3.5 instead of -3) that rules out a push so every bet ends in a win or loss.

Implied Probability

The chance of an outcome as suggested by the odds, with the bookmaker's margin baked right in.

Juice / Vigorish (Vig)

The commission a bookmaker tucks into the odds on every bet you place.

Moneyline

A bet on which team or player wins outright, with no point spread to worry about.

No Action

A bet that gets cancelled with your stake refunded, usually because of a postponed event, a scratched player, or voided conditions.

Odds Formats

The three main ways odds are shown to you — Decimal, Fractional, and American (Moneyline).

Off the Board

A game or market the sportsbook has temporarily pulled from betting, usually because of uncertainty like injuries or weather.

Over/Under (Totals)

A bet on whether the combined score of a game will land over or under a number the sportsbook sets.

Pick'em

A matchup with no favorite -- the spread sits at zero, so you just pick who wins.

Point Spread

A handicap that evens things out between the favorite and the underdog.

Push

A bet that ends in a tie against the spread or total, where your stake comes right back to you.

Straight Bet

A single wager on just one outcome -- a moneyline, point spread, or total -- instead of a parlay or combined ticket.

Bet Types

Asian Handicap

A soccer-friendly spread bet that removes the draw by applying fractional or whole-number handicaps to one or both teams.

Cash Out

A handy feature that lets you settle a bet early, before the event ends, so you can lock in a profit or trim a loss.

Double Chance

A soccer bet covering two of the three possible match results (home/draw, away/draw, or home/away), cutting risk in exchange for lower odds.

Futures Bet

A wager on something that gets decided down the road, like who wins a league title or lifts a tournament trophy.

Hedging

Betting the other side of a wager you already have so you can lock in a profit or cut your losses no matter what happens.

Live Betting (In-Play)

Betting on an event while it's already underway, with the odds updating in real time as the action unfolds.

Parlay (Accumulator)

One bet that ties together two or more picks; every single pick has to win for you to get paid.

Player Prop vs Game Prop

Player props ride on one athlete's performance (like total passing yards); game props ride on team or match events (like which team scores first).

Prop Bet (Proposition Bet)

A wager on something specific that happens during a game, which may have nothing to do with who actually wins.

Round Robin

A combo bet that builds multiple parlays from a group of picks, covering different subset combinations.

Run Line / Puck Line

A sport-specific spread — the run line is a fixed 1.5-run spread in MLB baseball, and the puck line is a fixed 1.5-goal spread in NHL hockey.

Same-Game Parlay

A parlay where every pick is drawn from one single game or event instead of several different contests.

Teaser

A parlay variation that lets you nudge the point spread or total in your favor in exchange for a smaller payout.

Value & Strategy

Arbitrage Betting

Backing every possible outcome across different bookmakers so you lock in a profit no matter who wins.

Bankroll

The money you set aside just for betting, kept completely apart from the cash you use for everyday life.

Buying Points

Paying for a friendlier spread or total by taking worse odds, often to cross key numbers like 3 and 7 in football.

Closing Line Value (CLV)

The gap between the odds you bet at and the final closing odds, widely used as a way to measure your betting skill.

Edge

The advantage a bettor has when they think an outcome's true chance is higher than what the odds imply, beating the sportsbook's price.

Expected Value (EV)

The average amount you can expect to win or lose on a bet over the long run.

Fade the Public (Contrarian Betting)

Betting against the side most casual bettors back, on the idea that public sentiment can create value on the opposite side.

Kelly Criterion

A handy formula that tells you the ideal stake based on your perceived edge and the size of your bankroll.

Key Numbers

The margins of victory a sport sees most often, which makes some point spreads matter a lot more than others.

Line Shopping

Comparing the odds across several bookmakers so you can grab the best available price on a bet.

Matched Betting

A beginner-friendly method that pairs sportsbook promos like bonus bets and boosts with opposing wagers to lock in a near-guaranteed profit.

Middling

Betting both sides of a game at different point spreads so that, if the final margin lands in between, both bets win.

ROI (Return on Investment)

The percentage of profit or loss measured against the total amount you've wagered.

Steam Move

A sudden, sharp swing in a line driven by heavy betting from professional bettors or syndicates.

Tout

A person or service that sells betting picks or predictions, often with overblown claims about their win rate.

Units

A standardized way to measure bet size against your bankroll, so you can track results and compare performance no matter the dollar amounts.

Variance (in Betting)

The natural ups and downs in results that show up even when you're consistently making positive expected value bets.

Market Terms

Betting Handle

The grand total of money wagered on a given event or over a set stretch of time.

Betting Limits

The smallest and largest amounts a bookmaker is willing to take on a single bet.

Chalk

Betting slang for the favorite in a matchup; 'betting the chalk' simply means backing the side everyone expects to win.

Line Movement

When the odds or spread shift after the opening line goes up, driven by betting action, injuries, weather, or fresh news.

Oddsmaker / Bookmaker

The person or company that sets the betting lines, manages risk, and takes wagers on sporting events.

Opening Line / Closing Line

The opening line is the first set of odds posted; the closing line is the final odds right before the event starts.

Public Betting Percentage

The share of total bets placed on each side of a market, showing where most everyday recreational bettors have put their money.

Reverse Line Movement

When a line drifts the opposite way from where most public bets sit, hinting that sharp professional money is backing the other side.

Sharp vs Square

Sharps are professional bettors who wager with an edge, while squares are casual bettors who usually follow the crowd and public sentiment.

Stale Line

Odds that have not yet caught up to fresh news like injuries or lineup changes, opening a possible value spot for sharp-eyed bettors.