musrooms or moss that growing in or around the rim of your asshole.
Paul Durso has gnarly butt fungus.
by johann smelts January 27, 2009
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Brandon has butt fungus and he can't get any dates!!!!
by brandon dinglehoff November 18, 2005
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Discusting, moldy fungus, growing around, on, or inside a person's butt.
Doctor:I had a patient come in today with some nasty butt fungus, he asks if I would clean it for him. I said" Hell no!!!!!!!!!!!!"
by JOOOOOOOOOOSE January 17, 2010
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A SUBSTANCE THAT EMITS FROM THE MOUTHS OF POLITICIANS AND SMELLS VERY MUCH LIKE ASS
THE DEMOCRATS ARE TALKING BUTT FUNGUS A LOT THIS WEEK
by PICKLE PIRATE January 28, 2010
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school yard taunt. Denotes the person is icky
"that Tommy is a crusty finger fungus butt"
by Peter Rothe March 6, 2008
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