F.B.I. 

an acronym that stands for Federal Bureau of Investigations. Also an acronym for Face Book Investigations one of the F.B.I.'s internet crimes divisions.

I called the F.B.I. on somebody who is stalking me on facebook and the operator referred me to the Face Book Investigations unit.

F.B.I. by PseudoCOP December 8, 2009

F.B.I. 

Face Book Idiot: A person whom you've never met, befriends you on Facebook, and after reading your comments and looking at your profile...thinks they know you, and begins to judge you as such. This person begins to comments on conversations you are having with "real friends" you know as if they know you. Seriously? This is the epitome of an F.B.I.

You know that guy that trolls me once in awhile? Well, he just commented on a conversation I was having with my brother and said something so unreasonable as if he knows me. Really? Let's hope this guy never ends up on a jury. Time to block him, he's an F.B.I.

F.B.I. by Gangster Barbie December 6, 2012

F.B.I. 

Friendly
Bitches
Incorporated

Boy 1: Duude, that girl is such a savage. You think shes a part of the F.B.I.?

F.B.I. by mstachessayblank June 13, 2016

F.B.I 

Female Body Inspector

Bob looks at girls a lot, hes is a female body inspector

F.B.I by Geppy May 13, 2005

F.B.I 

Fucking Big Indian: A large man or woman of indiginous roots. Commonly sighted at bingo halls and beer holes, this species can be quite dangerous when approached.

To avoid harm, look directly at the F.B.I., and slowly back away. It has been noted that throwing coins will distract them.

You walk into a bar or a bingo, and what's the first thing you see? That's right, it's an F.B.I. staring you down like you were a word they couldn't understand.

F.B.I by mik-mak-patty-smack October 7, 2006

F.B.I 

fake booby implants

nuff said

F.B.I by solaris December 15, 2003

F.B.I 

Federal bureau of investigation: basically people of strong power who like to screw this country over and all the people in it, in coralation with the president (a.k.a. george bush)

"hey look, its some dude from the F.B.I!"

F.B.I by lalalala October 22, 2003