pissflapass Share definition Flag When a girl rides a bike with her ass above the handlebars, and her piss flaps are big enough to wrap her ass cheeks. She nailed a 360 pissflapass on that jump! pissflapass by Monkeydungflung January 7, 2019 0 0 Get merch Get the pissflapass mug. Buy Now — $32.95 See more merch