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Acronym standing for "best friend until college", or "best friend until cremation" for people who will be friends until death. It is an alternative to the hugely overused BFF and gives you an excuse to say the f-word, so you should say it.
Tom: Wow, you are soooo cool.
Rob: Really?
Tom: Yes. you are definitely my ARE MY BFUC.
by H, C, K, R, and E January 01, 2008
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Adj. Big fat ugly chick

Ex. Matt: I asked her out

Me: who

Matt: maddy

Me: ewe that bfuc
Ewe you asked out that bfuc
by Carter da pimp March 25, 2010
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