FI

An FI is an an abbreviation for Fucking Idiot. You see these driving on the roads every fucking day. You can also find them in the workplace, in stores, and health clubs, police departments, and yes hospitals too. Most of them are men, but some are women.

That FI cut me off!

by Non FI May 30, 2014

fi.

the common abbreviation for fish

i have caught me a tasty fi.

by thursday April 30, 2006

fi-fi bag

A sock or towel used in jacking off to eliminate hand to penis contact. Normally found in bunks in jail cells, boy scout camps, and tour bus bunks. They should always be handled with gloves or a stick due to the nature of the goo they normally contain.

Why are there socks in all the bunks? Don't touch them, they're fi-fi bags!

by twistednick December 28, 2009

Fi-Fi

fire fighters; fire engine; sound of fire alarm

Dude, what's that siren? I smell smoke... It's the FI-FI!

by fifithomas February 13, 2015

Fis

when a person has to fart and pee at the same time.

Holy Shit, i hav yo Fis so dam bad.

by ASs..Holee December 25, 2004

FI

First Impression

Basic white girl #1: Comment below for an FI!
Basic white girl #2: Comment!!!!
Basic white girl #1: Omg you have always been my favorite person forever!
Basic white girl #2: Awwww

by TheLetterE July 31, 2017

FI

a acronym for fire, one that is the finest of the finest.

Damn, that gul there is the Fi.

by Pimptress March 12, 2003