alpha slap Share definition Flag To slap another in the face with ones dick. The hand may be used for extra leverage at the base. Humiliation is always the goal. 1. "I'd break y'alls jaw with my alpha slap" 2. "bitch wouldn't shut up, so's i alpha slapped her" alpha slap by Bag-le-douche December 10, 2007 0 0 Get merch Get the alpha slap mug. Buy Now — $32.95 See more merch