The acrenym for the Former Yugoslav Republic Of Macedonia.

when you're hungover as shit after a spending a night drunk as a skunk

Fyrom is a country in the south of Europe, next to Greece, Bulgaria, Serbia and Albania inhabited by slavs. Because of some hate by the greeks they couldn't get the name they wanted and got assigned a shitty acronym. The name stuck and now everyone uses it.

Fuck You Retarded Orgasmic Motherfucker