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.
by Zyfo April 23, 2006
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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*
by no that is not a disease January 03, 2021
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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
by Hahalolikaperson December 15, 2020
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