1 definition by livvysuxbrandonsballs

Top Definition
Designated fat or ugly friend. everyone has one, if you don't then you are one, don't try and lie to yourself. they make you look prettier and skinnier and appear smarter by comparison.
gods greatest inventions. Usually only contributing feature is their unattractiveness.
Livvy: 'i wish Brandon would notice me, but i'm just too fat and ugly and stupid.'

Kate: 'its OK, you just need to get yourself a DFUF. You are mine and because of your insignificance and hideousness, i haven't been without a boyfriend since we've been friends. You're a real asset'
by livvysuxbrandonsballs May 21, 2009

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