Bob butty Share definition Flag A penis that is below 3 inches and flabby making it Luke like a sandwich on the dick also, has a bellend like bob the builder (round ) normally used as an insult Bloody hell stacy, I swear to god his dick was a bob butty Bob butty by cghkgch October 2, 2016 0 0 Get merch Get the Bob butty mug. Buy Now — $32.95 See more merch