Not Fucking Invited. Commonly used when refering to sluts, whores, and dumb bitches who show up to parties where they are unwanted.
"God, that slut Katrina Samson is so NFI."
by yea dude September 3, 2006
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Q "Do you want to help me do the house work?"

A "I'm NFI on house work bitch!"
by Smoon March 3, 2004
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Why is this even abbreviated? Nfi....
by MasterIvey September 29, 2016
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No Fucking Interest. When someone tells you a spot of information and you really couldnt give a crap.
Guy1: Holy shit man i just saw your ex with some douche in a bar!

Guy2: NFI dude, NFI.
by SpartanTooTall February 19, 2009
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Although there are already meanings for the acronym, perhaps a more feasible definition: (Not Fixing It)

Used by those who know that texts aren't a fucking college application essay so it should not be taken as such with silly grammar errors.
Cara: are you ducking kidding me

Cim: wut
Cara: nfi
by cimboss July 24, 2014
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im having a party in there wanna come?

maybe

well you cant

why not?

you're NFI

nfi?

not flipping invited!
by egg holder September 6, 2021
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also short for National Fatherhood Initiative, which is somewhat ironic.
by tin ass September 10, 2003
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