Top Definition
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
18 more definitions
Fi
Another word for 'TO'
Seh mi and Gurpz Resi link up kum fi create a plan

Lizten fi da man
by Gurpz Resi May 04, 2004
Fuck It!!!
I was trying to do something good, but I just said F.I.
by WOrkthatclit July 19, 2009
fi.
A common abbreviation for fish
"Look in that pond, there are two fi.s (Pronounced F-I-Dots) They are orange!"
by Jenny Any Dots April 14, 2006
Factual Information.

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

F.I.
by Tommytux December 15, 2006
fi.
the common abbreviation for fish
i have caught me a tasty fi.
by thursday April 16, 2006
Female Irrationality Syndrome. A condition found in 99% of women with the inability to rationally think through situations logically.
Man: "Hey honey what do you want for dinner?"
Women: "don't mind you pick"
Man: "ok, Chinese"
Women: "I don't want Chinese!"
Man: "what do you want then?"
Women: "I don't care"
Man: "God damn F.I.S!!!"
by Dr3v0m February 14, 2015

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