Definition: In sports gambling, a "middle" is placing wagers on opposite teams with advantageous point spreads. If a gambler bets on the Colts -13 over the Jets and the point spread moves and then the gambler bets on the Jets +15 against the Colts, they are going for a middle.
Examples:
Marv tried to middle the Super Bowl when he bet the Cowboys -5 and the Steelers +7.
