B.F.F. 

Like, best friends for EVER

1. .:-+JA + TM+-:.
!!BFF!!
2, OMG, Sarah and me are totally bff!

B.F.F. by Julia Ackbar November 12, 2003

B.F.F. 

Big Friends Forever!

Origin: "B.F.F!" on The Aquabats! new album Hi-Five Soup!
It talks about how Big Friends are in charge, and that you need them too.

Aquacadet 1: Dude, I walked through this fight, but no one did anything!?

Aquacadet 2: How?!

Aquacadet 1: Homie, my B.F.F.'s are in charge!!

B.F.F. by Sketch-Bat "Mr. Ska Zach" January 21, 2011

B.F.F. 

Best fucking friend

If she was not my B.F.F. I would hate her.

B.F.F. by boofuu November 2, 2003

B.F.F. 

Used to describe a member of the opposite sex (or the same sex) that is your current Best Fuck Fantasy.

Mmmmm, he is my B.F.F.

B.F.F. by Being Me December 26, 2007

B.F.F. 

Normally used to mean "best friends forever", but occasionally used to mean "butt fucking fags" as a humorous double entendre.

1. "You're a great friend Sara. We're B.F.F.'s." (sincere)

2. "Look at those B.F.F.'s over there ... snicker." (second meaning)

B.F.F. by Lord Dickish August 2, 2006

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.!

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.

B.F.F. by 2014_chiguy October 16, 2007