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...
by sheila in the car January 12, 2010
Get the f.b.i.mug. by Geppy May 13, 2005
Get the F.B.Imug. 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.
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.
by mik-mak-patty-smack October 7, 2006
Get the F.B.Imug. by Bal-der-Dash January 23, 2020
Get the F.B.I.mug. 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 July 16, 2008
Get the F.B.I.mug. 
by Mariann December 20, 2007
Get the F.B.I.mug.