McTubbyFatFuck Share definition Flag A fat man who shoves every possible thing in his mouth and keeps going. Man: Fucking Jared, stop being a Mctubbyfatfuck Jared: But penis is so gooood. Man: Sad bser McTubbyFatFuck by crazynig666 July 13, 2012 0 0 Get merch Get the McTubbyFatFuck mug. Buy Now — $32.95 See more merch