Sports betting is the activity of predicting sports results and placing a wager on the outcome. Odds boards in a Las Vegas sportsbook. Sports bettors place their wagers either legally, through a bookmaker/sportsbook, or illegally through privately run enterprises referred to as "bookies".

Action - A bet or wager. Against the spread - The result of a game including the point spread. Bad Beat - A bet that looks like the bettor is going to win but doesn't. Book (Sportsbook) - An place where someone can bet on the outcome of sporting events. Buck - AR$100 bet.