acronym which stands for "Back Fat Fuckin'". Achieved by pushing together two rolls of fat on some fat slut's back and pumping away. A good technique when the rotund cum-dumpster you're rogering has a hatchet wound so loose that it's like throwing a hot dog through a hallway.
You'll get that new aggressive full-blown AIDS if you bone that slutty keg-on-legs.

That's okay, I just plan on doing some BFF'n.
by Twisted Phister March 09, 2005
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BFF is a rock band on the Neverever Records label. Their music is a cross between the musical genres mossy rock and abstract pop.
I am rocking out to the new BFF track; it's so mossy!
by yamlord February 18, 2008
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2 girls: we're Bff's (bestfriendsforever)
2 guys: haaha big fat f*cker!!
by CANYOUREADTHISYESYOUCAN October 16, 2011
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Black Friday Friend. The person you are next to in line that you chat up during your wait before the doors open. The conversation usually involves some sharing of personal information or previous Black Friday experiences. Your BFF can give you some useful shopping tips if they are a seasoned Black Friday shopper. Note: Once the doors open, your BFF may become an adversary.
In line at Wal-Mart on Black Friday my BFF told me the exact location of the 40 inch LED TVs on sale for a hundred bucks. After the doors opened we both raced for them and I punched her in the head as she reached for the last the set.
by Dokto Snuggo January 18, 2013
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1. Best Friends Forever, mainly used by girls.
2. Boyfriend Forever.
1. Me and her are friends for life, we are BFF!
2. He will be my BFF.
by Nanda June 29, 2006
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