f.b.i. 

An anacronym for the term "free balling it",it is shorthand for a male's decision to go sans swaddling or minus his u-trou...

When he realized he was out of clean underwear,Carl decided to go f.b.i.

f.b.i. by sheila in the car January 12, 2010

F.B.I. 

Fucking Bunch of Idiots

Another government employee? Yup--it's the F.B.I. again......

F.B.I. by Bal-der-Dash January 23, 2020

F.B.I. 

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.

guy one: Hey dude, whats your F.B.I.?

guy two: (grabs balls and feels around) I'm at about...a 3.

F.B.I. by L. marx July 16, 2008

F.B.I. 

A person From the Big Island of Hawai'i visiting another island, especially O'ahu.

person 1: Where are you from?

person 2: F.B.I.!

F.B.I. by Mariann December 20, 2007

F.B.I. 

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.

F.B.I. by MIT-GUY August 11, 2012

F.B.I. 

F.B.I. stands for "Fat bitches incorporated" and is generally said to people who date fat women or like fat chicks.

"Ayo Jamal you are F.B.I. dawg!"

F.B.I. by Virgin2018 May 17, 2018

F.B.I. 

Fucking bloody idiot.

Look at that dude passed out on the lawn. He's a F.B.I.

F.B.I. by kermit the frong May 11, 2006