Top Definition
1)the act of spinning really hard naked aim to your partners face and hit your partner in the face with your testicles

2)if you are a female you have to punch or kick your partner right in the ball sack while he is cuming or ball sack smashinig you
my ball ball sack smash in lily's face left a mark
by Raphael M, Cam J ,Doug M April 02, 2008
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