B.F.F.

Commonly used as Best Friends Forever, but among your overweight friends you can use it as Big Fat Fucks.

John: Hey, wanna go to White Castle?
Bob: No, I'm on a diet.
John: But I thought we were B.F.F.!

by Alex Blake January 28, 2007

B.F.F.

Brain fart factor. A measurement of how much obvious information you forget when you take a test. Those with a B.F.F. of .1 forget 10% of the obvious. Those with a B.F.F. of .2 forget 20%, etc.

I only studied half the material and I have a .5 B.F.F. I'm only gonna get a 25% on the test. I'm screwed.

by 2014_chiguy October 16, 2007

B.F.F

B.F.F: BEST FRIEND FUCKER. WHEN GIRL IS FUCKING TWO GUYS THAT ARE BEST FRIENDS

MAN#1:I am hooking up with ELAINE
MAN #2 NO WAY so am I! She's a B.F.F AND A HOT ONE TOO !

by Eatmee November 19, 2019