National Slap-Ass Day Share definition Flag When a boy(or girl) slaps somebody’s ass. “Aye you know that’s it’s National Slap-Ass Day?!” National Slap-Ass Day by Latoya Greggs April 13, 2019 0 0 Get merch Get the National Slap-Ass Day mug. Buy Now — $32.95 See more merch