after sex piss Share definition Flag When a dude goes to take a piss after having sex and the piss sprays off target, ie. on his leg, side of toilet, or floor. Aw shit, I just got my after sex piss everywhere! after sex piss by roundtuit February 9, 2018 0 0 Get merch Get the after sex piss mug. Buy Now — $32.95 See more merch