Bumping of shit Share definition Flag What happens when a large macho black guy rubs his feces over you. Johnny: Hey, dude, did Cole Train rub his feces over you?Harry: Yeah, I'm bumping of shit! Bumping of shit by CrustyRing September 29, 2010 0 0 Get merch Get the Bumping of shit mug. Buy Now — $32.95 See more merch