FI

fiancé, the man who a woman is engaged to be married to

my FI has huge fingers. The jeweler measured him at a 15.5 but said to order a 16 if we wanted a thicker band. My FI is 6'4" and a big guy so it makes sense.

by musterionanonim February 21, 2013

FI

Code for 69. F is the 6th letter and I is the 9th

Fifififififif

by My yee 2 February 13, 2021

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

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

FI

Forced Induction. Usually used in car forums.

I'm going FI on my beater si next summer, y0.

by Sampy November 22, 2004

FI

1. "Fuck It" Used in southern Louisiana to symbolize a drug using/ gang banging lifestyle.

I'm FI all the motha f*ckin time"

by Emetic May 13, 2005