Glossary of NFL Football Betting Terms: A Comprehensive A-Z Guide

Author: Mateusz Mazur

Date: 22.10.2025

Understanding the language of sports betting is the first step toward wagering successfully on the NFL. This glossary defines the essential jargon used by oddsmakers, sportsbooks, and professional bettors. Familiarizing yourself with these terms, from the Vig (the cost of the bet) to the Hook (the half-point), will improve your decision-making and help you spot betting value.

The Essentials: Bets, Odds, and Teams

Term Definition and Context
Action A bet or wager placed on a sporting event. When you place a bet, you are putting money “in action.”
Against the Spread (ATS) Refers to the result of a game relative to the point spread. A team covers ATS by beating the spread.
Chalk A slang term for the Favorite in a game, expected to win.
Dog (Underdog) The team expected to lose the game, denoted by positive odds (e.g., +150).
Favorite The team expected to win, denoted by negative odds (e.g., -200).
Moneyline (ML) A simple straight bet on which team will win the game outright, without considering the point spread.
Over/Under (Totals) A bet on whether the combined score of both teams will be over or under a set number (the Total).
Pick’em A game considered so evenly matched that there is no favorite or underdog; the spread is zero.
Spread (Point Spread) A handicap set by oddsmakers to level the betting field. The favorite must win by more than the spread; the underdog can lose by less (or win).
Total The specific number set by the oddsmaker for the Over/Under wager (e.g., O/U 45.5).
Underdog The team expected to lose; often provides better payout odds than the favorite.

Key Financial and Bookmaker Terms

Term Definition and Context
Arbitrage (Arb) An advanced strategy involving placing bets on all possible outcomes of an event across multiple sportsbooks to guarantee a profit due to differing odds.
Bankroll The total amount of money a bettor has set aside and strictly allocated for gambling.
Book (or Bookie) Short for sportsbook; the entity or person accepting the bets and setting the odds.
Dime / Nickel / Dollar Slang terms for bet sizes: Dime is ; Nickel is ; Dollar is .
Edge A perceived advantage a bettor has over the sportsbook’s published line, often based on superior statistical analysis or information.
Even Money A bet where the potential winnings equal the amount staked (e.g., odds of +100).
Exposure The total amount of money a sportsbook risks losing on a particular event or wager.
Handle The total amount of money wagered on a single event or over a given time period.
Juice (Vig or Vigorish) The commission or fee the sportsbook takes on a wager. At standard -110 odds, the juice is about 4.55% of the total bet, requiring a bettor to win 52.38% of their bets just to break even.
Limit The maximum dollar amount a sportsbook will accept from a bettor on a specific wager.
Vig (Vigorish) See Juice.

Strategic Terms and Bet Variations

Term Definition and Context
Bad Beat A painful loss where a bet seemed certain to win but lost due to an extremely unlikely or last-second event (e.g., a “garbage time” touchdown).
Beard A person who places a bet for another individual to hide the true identity of the bettor (often used by sharps who face betting limits).
Circled Game A game with betting restrictions or lower limits, often due to high uncertainty factors like critical injuries, severe weather, or internal issues.
Cover When a team successfully beats the point spread, either as the favorite or the underdog.
Future Bet A wager placed on an event that will happen later in the season or off-season, such as betting on the Super Bowl winner or the regular-season MVP.
Halftime Bet A straight bet placed only on the outcome of the second half of a game.
Hedge Placing a second bet opposite to your original wager (often in a parlay or future bet) to lock in a profit or reduce potential loss.
Hook The half-point (.5) added to a spread or total to eliminate the possibility of a Push (tie). For example, a spread of 7.5 instead of 7.
Key Number Common margins of victory in the NFL, such as 3, 7, and 10, that are crucial when betting spreads or teasers.
Lock A term used by bettors for a wager they believe is a guaranteed winner, though no such bet truly exists.
Longshot An extreme Underdog with very high positive odds and a low perceived chance of winning.
Middle An advanced technique where a bettor wins both sides of a wager due to favorable line movement, though it is rare.
Off the Board When a game is completely removed from betting options by a sportsbook, usually due to major, last-minute uncertainty.
Parlay A single bet that combines two or more wagers; all wagers must win for the parlay to payout, which multiplies the odds for a high return.
Prop Bet (Proposition) A wager on a specific outcome within a game that does not depend on the final score, such as a player’s passing yards or the first team to score.
Push A tie; when the game result exactly matches the spread or total, resulting in the stake being refundedto the bettor.
Sharp A slang term for a professional, highly skilled, and knowledgeable bettor.
Steam Move A rapid, sudden shift in a betting line caused by a large, concentrated volume of bets, often indicating a move by sharp bettors.
Straight Bet A single wager on one outcome (Moneyline, Spread, or Total) as opposed to a parlay.
Teaser Parlay that allows the bettor to adjust the point spread or total in their favor (e.g., adding 6 points) in exchange for reduced payout odds.
Wise Guy Another common term for a Sharp bettor.

How to Use This Glossary

Familiarity with this terminology is essential for success. When reviewing odds, always look beyond the initial number to understand the underlying mechanics:

  1. Calculate the Cost: The Juice (typically -110 odds) determines the true cost of the bet.
  2. Look for Value: Use knowledge of the Key Numbers (3, 7) to spot advantageous spreads where the Hook creates a statistical edge.
  3. Stay Disciplined: Maintain your Bankroll by sticking to Straight Bets and limiting risky Parlays or Exotic Bets.