SwigglesMcGiggles's definitions
To masturbate vigorously.
Friend 1 : "Hey, why weren't you out last night?"
Friend 2: "Sorry, I was slapping the Black Man's knee.
Friend 2: "Sorry, I was slapping the Black Man's knee.
by SwigglesMcGiggles April 7, 2015
Get the slapping the black man's kneemug.