rather like a "bum" (fart) but out of your mouth!
did you just "face bum?"
by zoeamy June 20, 2006
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DUH its poop coming from a bum bum booty and having diarhhea, but when u say face, it means the person u said it to looks like poopy bum bum booty having diarheea
in example for poopy bum bum booty diarheea face

me: HEY POOPY BUM BUM DIARHEEA FACE
friend: *LAUGHS* funny lol.
by vincent poopy funny orangepeel January 19, 2022
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A Fucking Bum face is a insult aimed at people that deserve Testicular Neutering
Bob: That fucking Mister Garbutt gave me a After School Detention
Loo: What a fucking bum face
by AKewlDefiner October 19, 2023
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