The phrase "square bettors" refers to people who bet on sports in a conventional or predictable manner. They usually bet on popular teams or favorites, rather than taking risks with underdogs or unusual bets. Full definition
The value derived from betting against the public increases significantly during the postseason due to the surge of square bettors entering the marketplace. (sportsinsights.com)
During the playoffs, the number of bets placed on every game nearly doubles, with much of the action from square bettors. (sportsinsights.com)
Additionally, this line movement seems to be driven completely by square bettors as there have been no betting systems triggered on this game. (sportsinsights.com)