F.B.I. stands for floppy ball index. The index ranges from 1-5, 1 being really tight, and 5 being the floppiest it can be.
by L. marx January 25, 2006
by Mariann November 19, 2007
Face Book Intermission - a brief respite from the philosophical, intellectual, cultural, family-oriented, self-centered, political, food-tripping, ego-tripping, arrogant, creative, opinionated, plagiaristic, bla, bla, bla posts, comments, and shares in Face Book. Often, but not always, the F.B.I. is about a term derived or influenced by U.D. (Urban Dictionary). Sometimes the term is posted first in F.B.I. before it appears in U.D.
I'm tired of all these pictures and comments from my ex-girlfriends and ex-boyfriends... I'm now ready for F.B.I.
by MIT-GUY August 11, 2012
F.B.I. stands for "Fat bitches incorporated" and is generally said to people who date fat women or like fat chicks.
by Virgin2018 March 28, 2018
by kermit the frong April 30, 2006
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.
by PseudoCOP December 09, 2009
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.
by Gangster Barbie December 02, 2012