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1.
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.
av musterionanonim 21 februari 2013
 
2.
Factual Information.

Confirming a statement.
Going for a dump this morning Gaffer?

F.I.
av Tommytux 15 december 2006
 
3.
fi.
A common abbreviation for fish
"Look in that pond, there are two fi.s (Pronounced F-I-Dots) They are orange!"
av Jenny Any Dots 14 april 2006
 
4.
Fuck It!!!
I was trying to do something good, but I just said F.I.
av WOrkthatclit 19 juli 2009
 
5.
fi.
the common abbreviation for fish
i have caught me a tasty fi.
av thursday 16 april 2006
 
6.
Fi
Another word for 'TO'
Seh mi and Gurpz Resi link up kum fi create a plan

Lizten fi da man
av Gurpz Resi 4 maj 2004
 
7.
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!
av Non FI 29 maj 2014