Commonly used as Best Friends Forever, but among your overweight friends you can use it as Big Fat Fucks.
by Alex Blake January 24, 2007
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 01, 2007
by Eatmee November 20, 2019