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When you are walking and your swaying arm or hand hits the thigh or crotch area of another guy. It is usually followed by an awkward sorry.
I knew I had no chance being friends with Billy after I crotch skimmed him walking to BK.

Guy 1: Dude I touched this guys dick today!
Guy 2: What? Why?
Guy 1: Well not purposefully, I was walking with this guy and my hand hit him square in the balls
by hodo15 July 29, 2009
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