Gumbutt Share definition Flag The diarrhea and farts produced from chewing too much sugar free gum. Man, you chewed that whole pack of Extra in 10 minutes. Dude you're gonna get gumbutt! Gumbutt by climage September 9, 2011 0 0 Get merch Get the Gumbutt mug. Buy Now — $32.95 See more merch