B.F.B. 

Big fat bastard. A way to insult fatties without them knowing.

"Hey look at that B.F.B.!"

B.F.B. by The Murf September 29, 2005

B.F.B. 

Big Fuckin' Bag, it is the largest bag available, used for more inventory space

Used in World Of Warcraft

TinySenyor: I just bought a B.F.B. for more inventory space

B.F.B. by Asidbath February 2, 2007

B.F.B. 

acronym for butt fucking buddy; can be used as a noun or verb

She's my sexy B.F.B.

I'm gonna B.F.B. you so hard!!

B.F.B. by icantthinkofapseudonym1 May 29, 2009

B.F.B. 

Big Fucking Baby

Whiny patients in a hospital who bitch about EVRY LITTLE AILMENT no matter how trivial and drive employees of said hospital INSANE.

"My toe hurts, I have a hangnail, my skin's so dry, I need another snack, I have to pee again..."

"Oh my god, what a B.F.B."

B.F.B. by Ron December 19, 2003

B.F.B. 

Bloodly Fucking Bored

Im so B.F.B..

B.F.B. by Uh idk... September 29, 2008

B.F.B.a.F. 

The internet acronym for "Best Friend, Brother and Friend" made famous (sort of) on youtube by Justkiddingfilms in their halloween special. This acronym is used by Unco Same and Unco Chin, and usually confuses the vietnamese duo because of the use of many letters.

Unco Chin(in vietnamese accent): Unco Same is my Best friend, Brudda, and Friend!

Dashawn: Your best friend, brother and... friend?

Unco Chin: Yeah! B.F- no wait- B.F.aFB-no i mean-B.a.F.-

Dashawn(interrupting): Don't hurt yourself know.

(unco chin tries saying B.F.B.a.F.)

B.F.B.a.F. by holy kamera jizz November 5, 2009

B.F.B.C 

Big Fat Black Chick

A particularly large/Fat African American women that participates in a multitude of sports and my excel in Basketball due to her large body which in hand when boxing out

Isaac: Dude!! Kazhe did you see that B.F.B.C on their team???? Were never going to win
Kazhe: O my God she is huge our skinny white chicks will never box her out

B.F.B.C by Kazhe December 17, 2008