Mumptyhole Share definition Flag Mumptyhole is a word that sounds like an aboriginal word and it means “Fat Cunt” Person 1- Wow Jason really has been eating a lot Person 2- Yeah he is turning into a mumptyhole Mumptyhole by mumptyhole February 22, 2020 0 0 Get merch Get the Mumptyhole mug. Buy Now — $32.95 See more merch