Slap Face Share definition Flag 1) Oppiste of Kick Ass 2) Short for "slap in the face" Guy 1: That girl just turned me down cuz she heard I had a small package. Guy 2: Dude, that is slap face. Slap Face by greyfrog April 28, 2009 0 0 Get merch Get the Slap Face mug. Buy Now β $32.95 See more merch