Over–under
Type of wager at a sportsbook / From Wikipedia, the free encyclopedia
An over–under or over/under (O/U) bet is a wager in which a sportsbook will predict a number for a statistic in a given game[1] and bettors wager that the actual number in the game will be either higher or lower than that number.[2][3] One of the most commonly used statistics is the combined total score of the two teams, and for this reason the wager is also known as the total.
For example, in Super Bowl XXXIX, most Las Vegas casinos set the over–under for the score of the game at 46.0. A bettor could wager that the combined score of the two teams would be either more than or less than that number. Since the combined score of that game was 45, anyone who had bet on "under" won. The bet is called a push if the actual number exactly equals the over-under, in which case all bets are refunded.[4]