Top Definition
When a guy opens his stance then thrusts his hips back and forth, slapping his butt with his penis and balls.
Girl 1: "I just watched Big Brother 9, and i must admit that 'Crazy James' is smoking hot"
Girl 2: "He doesn't do it for me, but his taint slapping was wicked though, he must have a large penis to do that and slap his ass with it"
by Lise Reed February 21, 2008

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