1 definition by ryangoebel

Text abbreviation for "You're Fucking Up". Must be pronounced "Ya Fackin Ap" in speech
Not Hoppa: Hoppa, did you forget to feed the fish for the last 45 days? Because they're all dead and this bag of food expired 2 months ago.
Hoppa: Oh yeah, sorry man I just got caught up editing this short film.
Not Hoppa: YFU.
by ryangoebel December 16, 2013
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