by Hurricane Kenny November 16, 2009
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
1. when you lock you arms around a persons neck and hang on their back, and then another person does the same to you.
1. we were in the pool when delinna jumped on alexis' back and yelled santa sack and then hailey did the same to delinna making it a double santa sack.
by alexis_delinna_hailey July 21, 2009