Top Definition
Its a game involving a wooden paddle or your hand and someones testicles. The object of the game is to see how hard you can wack someones balls until they turn red each time you wack the sack you get points. This game originated from the website ebaumsworld.
1.Today me and my brother played wack the sack. !!!!Now My balls really hurt!!!!
2. I really love playing wack the sack with my boyfriend.
by Wack the sack. August 29, 2008
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