Whappin Them Cakes Share definition Flag 1. To have vaginal intercourse. 2. Also referred to as cake whappin. "Damn jack, you should've seen that chick I had last night. I was straight whappin them cakes, son! Word up!" Whappin Them Cakes by tns_187 September 23, 2009 0 0 Get merch Get the Whappin Them Cakes mug. Buy Now — $32.95 See more merch