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1. B.U.F.F.
big ugly fat friend. Every group of friends usually has one.
"Why does Sally hang out with them?"
"I don't know man, she's such a B.U.F.F.
2. b.u.f.f.
Big ugly fat friend. Usually refers to a freind that makes you look a whole lot better in social situations.
I,m gonna go to the bar this weekend and bring my B.U.F.F. Jeff.
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