NFI phrase 3noun 1forms 1 phrase3 •(Internet) Initialism of no fucking (freaking) idea, expressing lack of knowledge on the subject matter. •Initialism of no further information, expressing lack of knowledge on the subject matter. •(slang) Initialism of not fucking invited.Speaking of the guest list, though, it is most disappointing to find some of the third tier European princelings unable to hide their bitterness at being NFI. — 2011 noun1 •Initialism of non-football injury; any injury sustained by a player outside of games or training. formsNFIs
