1 definition by Fatcat0006

Top Definition
The act of running your penis dry of semen; similar to the tapping of a keg. Masturbating.
"I'm kind of bored right now, I think I'm gonna go tap the sack"


"Man, I beat off so much today, my sack is tapped" (past tense)
by Fatcat0006 October 18, 2010
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