1 definition by Corey3259
When two guys are fucking the same girl, one in the front and one in the back, and their timing gets messed up leading them to smack eachothers balls on the girl's taint
Me and Jim were fucking this chick the other day and he screwed up the timing and we ended up doing the double sack taint smack!
by Corey3259 April 11, 2015