Top Definition
BMFF means Best Motha Fuckin Friend
if you were talking about your friend in a coment you could say "the bmff ever" <33
by BROHOE2277 May 13, 2007

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Best Male Friend Forever
A girl's very close friend of the other gender. She can have more than one, but they are all as close to her as a BFF, so nobody usually has more than one. May or may not be in love with the girl.
Girl one: Stop hanging out with Steve, you hang out all the time.
Girl two: But Steve's my BMFF, of course we're going to hang out.

Steve: Yeah, you're just jelly that you don't have one!
Girl one: *cries*
by BMFFSforev February 19, 2013

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Best Mexican Friend Forever
Do you know Jose, from East LA? That guy's my bmff
by Greg Sanders April 08, 2007

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Something you send to someone you want to have sexual relations with.
BMFF = Be My Fuck Friend
by dramadiva March 24, 2011

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