Short for fucked. You know how there's that phrase, mofo, where the mo is "mother" and the fo is "fucker"? It's sort of like that.
When using this to shorten the phrase "Fucked up", it is not necessary to say "fo'd up". "fo'd" will work.
Man, that Datura shit is fo'd. I went crazy for a day, and I still can't read anything.
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Man1: Man2, that fattie over there just got up, and look! He sat on your alienware laptop!
Man2: Dammit! He fo'd my ultimate gaming machine! Even my boomslang mouse is fo'd!
Man1: L33t.
SlangItalian definition, an ancient lenguage ancestor of the Italian, it litteraly means "and you who talks like that what do you want from me?? Go kill yourself breathing gas!"
Slang italiano, deriva da un dialetto antico, significa letteralmente "e tu che parli così cosa vuoi da me? Fai una cosa e vatti ad uccidere con il gas!"
-Hey, could you please send me your homework?
-no.
-E ka ti parl d acs da me c ve cercand Fo na cos vatt ad acck pu gas