61 Terms Defined
Sports Betting Glossary (A–Z)
Every betting, handicapping, and market-maker term you will encounter across Sharp Wire, explained in plain English with mathematical context and direct links to our in-depth guides.
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- 30% Rule#
- A bankroll discipline rule where a bettor caps their session downside by stopping once 30% of accumulated peak session profits have been given back, permanently banking the remaining 70%.
A
- Action#
- A bet, or having a wager on a game. "I've got action on the Chiefs" simply means you have a bet on them.
- Against the Spread (ATS)#
- A team's record when betting the point spread rather than who wins outright. A team can win a game but fail to cover, so its ATS record differs from its win-loss record.
- Angle#
- A situational, motivational, or scheduling circumstance surrounding a game (such as rest, travel, weather, or rivalry) that may alter performance beyond what raw statistics show.
- Arbitrage#
- Betting every outcome of a market at different books so you profit no matter what happens. Possible when two books disagree enough that the combined odds imply less than 100%.
B
C
- Chalk#
- The favorite. "Betting chalk" means backing the favored side.
- Closing Line#
- The final odds a market settles on right before the event starts - the market's most accurate estimate after absorbing all information and money.
- Closing Line Value (CLV)#
- Whether the price you bet was better than the closing line. Consistently beating the close is the strongest sign of a long-term edge.
- Contender / Pretender / Rebuilding#
- A three-tier classification framework used to evaluate a team's true championship potential and prevent emotional overreaction to individual regular-season games.
- Contract Price#
- On a prediction market, the price of a yes/no contract in cents, which equals the market's implied probability (60¢ = a 60% chance).
- Cover#
- When a team beats the point spread. A −7 favorite covers by winning by 8 or more.
D
- De-Vig#
- Removing the vig from a market to reveal the fair, no-vig probabilities that add up to exactly 100%.
- Decimal Odds#
- An odds format showing total return per $1 staked, including your stake. 2.00 is even money; 1.50 implies about 67%.
- Dime#
- Bettor slang for a $1,000 wager.
- Dime Line (10-Cent Line)#
- A moneyline market with only a 10-cent gap between the favorite and underdog (e.g., −125 / +115) compared to the 20-cent straddle charged by most retail books. Playing YouWager's True 10-Cent MLB Dime Line cuts your baseball juice in half on every game.
- Dog / Underdog#
- The team expected to lose. Underdogs pay out more than even money because they're less likely to win.
E
- Effort Level (A/B/C/D)#
- A four-tier grading system (A = peak, B = solid effort with mistakes, C = inconsistent / look-ahead, D = non-competitive) used to forecast how close to full potential a team will perform.
- Even Money#
- Odds of +100 (2.00 decimal) - you win the same amount you risk.
- Exchange#
- A platform where bettors wager against each other rather than a house, setting their own odds. Betting exchanges and prediction markets work this way.
- Expected Value (EV)#
- The average profit or loss of a bet if it were repeated many times. Positive EV (+EV) bets win over the long run.
F
- Fade#
- To bet against a side - often against heavy public money or a bettor on a cold streak.
- Favorite#
- The team expected to win, shown with minus odds (e.g., −150). Favorites pay less than even money.
- First Five Innings (F5)#
- A baseball wagering market settled after 5 completed innings, used by sharp handicappers to isolate starting pitching edges without exposure to bullpen variance.
- Futures#
- A long-term bet on an outcome decided later, like a champion or season award winner.
H
- Handle#
- The total amount of money wagered on an event or by a sportsbook over a period.
- Hedge#
- Betting the opposite side of an existing wager to lock in a guaranteed result or reduce risk.
- Hold#
- The sportsbook's margin on a market - the total implied probability above 100%. Lower hold means better prices for you.
I
- Implied Probability#
- The chance of winning that a set of odds represents. For decimal odds it's simply 1 ÷ the decimal price.
J
- Juice#
- Another word for the vig - the commission built into the odds.
K
- Kelly Criterion#
- A formula that sizes each bet to your edge to maximize long-term growth. Most bettors use a fraction of it to reduce risk.
L
- Limit#
- The maximum a book will accept on a bet. Sportsbooks often lower the limits of winning bettors.
- Line#
- The odds or point spread a book offers on a game.
- Line Shopping#
- Comparing multiple books and betting at the one with the best price - the simplest proven way to improve returns.
- Live Betting#
- Wagering on a game while it's in progress, with odds that update in real time.
- Lock#
- Slang for a bet someone is highly confident in. In reality, no bet is a true lock.
- Look-Ahead Spot#
- A scheduling disadvantage where a team faces an inferior opponent immediately prior to a critical rivalry or championship showdown, frequently causing a sluggish, below-potential performance.
M
N
- No-Vig / Fair Odds#
- The price a market would offer with zero margin - the true implied probability once the vig is removed.
O
P
- Pari-Mutuel Wagering#
- A betting format common in horse racing where all bets enter a shared pool, the operator deducts a takeout percentage, and remaining winnings are divided among winning tickets, meaning bettors compete against each other rather than fixed house odds.
- Parlay#
- A single bet combining multiple selections; all must win. Payouts multiply, but so does the vig.
- Pick'em#
- A game with no favorite, where both sides are priced roughly even and the spread is zero.
- Prediction Market#
- A marketplace where you trade contracts on event outcomes; the price is the crowd's probability, set by traders rather than a book.
- Prop (Proposition Bet)#
- A bet on something within a game other than the final result - a player's stats, the first team to score, and so on.
- Public / Square#
- Casual, recreational bettors, who tend to back favorites and popular teams. Their money is less predictive than sharp money.
- Push#
- A tie against the spread or total, where your stake is refunded and no one wins the bet.
R
- Reduced Juice (5% Friday Football)#
- Promotional pricing where a sportsbook cuts its standard −110 commission in half to −105 (a 2.38% hold instead of 4.55%). YouWager.lv offers a 5% Juice Special on Fridays on all weekend football action alongside periodic No-Juice (0% vig) games.
- Reverse Line Movement (RLM)#
- When a line moves opposite to where most public bets are, signaling sharp money on the less popular side.
- Road Sweep Underdog#
- A baseball series angle where a road team enters Game 3 having won the first two games of a series but is priced as a plus-money underdog, offering contrarian value.
S
T
U
- Unit#
- Your standard bet size, usually 1-2% of your bankroll. Tracking results in units keeps staking consistent.
V
W
- Wiseguy#
- Slang for a sharp, respected professional bettor whose action moves lines.