fumble six
A fumble six is the occurrence in American Football when the offensive player fumbles the ball, and a defensive player picks up the ball and returns it for a touchdown. Hence the six, for a touchdown is worth six points.
Ex 1: Dude I destroyed you in Madden 12! I got like 5 fumble sixes!
Ex 2: The highlight of the player's career was when he got a fumble six.
Ex 2: The highlight of the player's career was when he got a fumble six.