Fubartmuffs Share definition Flag Muffs that cover your butt to muffle your farts and other gaseous noises. Dude wear some fubartmuffs next time! Fubartmuffs by Fubartmuffs August 3, 2016 0 0 Get merch Get the Fubartmuffs mug. Buy Now — $32.95 See more merch