obviously, we all know it's a female garment.
however, if you go to a catholic school or any school with uniforms, you also know that it is a verb.
to SKIRT someone is to come up behind them and pull the back of their skirt up, therefore exposing their buttocks to whoever is behind them.
it sucks to be skirted, but is the best way to get revenge on someone / embaress the hell out of them, though skirting must be done responsibly, because everyone hates those never-ending wars to see who can skirt the most people. (kind of like the circle game)
chick 1: like, oh my god, someone totally skirted me today at lunch and, like, it was right next to the football players' table, and, like, they all saw my bright pink thong! like, traumatizing!
chick 2: at least you HAD underwear on.
chick 1: true.
(chick 1 skirts chick 2, who screams, then a cat fight ensues. they both take their shirts off for some reason and prance around, screaming 'bitch!' at each other, occassionally taking a swing. it's quite arousing.)