National Slap Ass Day Share definition Flag May 13 and 14 is national slap ass day Oh shit Jon just slapped Jessica's ass Duh dude, it's national slap ass day National Slap Ass Day by 69694206969 May 10, 2019 0 0 Get merch Get the National Slap Ass Day mug. Buy Now — $32.95 See more merch