Cum Butty Share definition Flag A cum butty is a sandwich or a oatcake which a man has a ejaculated into. Billy: The bread needs using up so I made a Cum Butty Harry: mmm yes tasty Cum Butty by Jackling_ August 6, 2019 0 0 Get merch Get the Cum Butty mug. Buy Now — $32.95 See more merch