Ffi ffi 

Ffi ffi is a cute nickname for a childish girl who loves her phone and ipad

Ffi ffi is a cute living girl

Ffi ffi by Hahalolikaperson December 14, 2020

fatal familial insomnia (ffi) 

something that literally traumatized the haikyuu fandom forever. its a rare disorder that affects the part of your brain that controls the sleeping cycle. patients usually die from it within year or two. something used in a bokuaka fanfiction, (bokuto x akaashi) and it killed akaashi's lover forever and now we're all emotionally numb

person: hey whats fatal familial insomnia (ffi) ?
yes, it means fatal familial insomnia and that means an illness that kills you overtime from weight loss, dementia, and sleep deprivation basically.

*crying noises*

fatal familial insomnia (ffi) by no that is not a disease January 3, 2021

ffi 

A common acronym that is used to say "For the Fun of It" in a fast way.

Harry: What was that good for?
Dennis: Just ffi.

ffi by Zyfo May 4, 2006

FFI 

FFI is short for Finger Flip Inc, a fingerboard forum. Even though it is a fingerboard forum people go there to get into fights about every little thing(mostly non fingerboard related). Also a place were everyone likes to suck up to the FlatFace team and get on there good side just because they are better than most(even though some of the team sucks) of us that makes them superior to most. But there is still a lot of cool people on ffi that aren't cocky or complete dumbasses and fingerboard just to fingerboard.

fingerflipinc.com/forum

Joe: Hey look at this thread in chit chat
Bob: What? Another fight?
Joe: How did you know?
Bob: It's ffi.

FFI by Iistheman July 20, 2009

FFI 

friends finding igloos

they are ffi

FFI by alfjasi November 24, 2010

FFI 

Fatal Familial Insomnia- I can't get passed stage one sleep and its slowly turns your brain into mashed potatoes it really sucks. its rare though

If you know somebody in your family has FFI seek medical attention immediately

FFI by hoodexperience May 31, 2010

FFI 

Finger Flip Inc. A fingerboard forum were all the cool techdeckers go.

Jim: I want to be cool.
Bill: Go to ffi.

FFI by George W. Hairy Bush December 24, 2008