Skuleo - Ancient Greek. Literally means "I loot the corpse of my enemy". Them Ancient Greeks sure kicked ass. I am uncertain as to the correct pronounciation of skuleo, but in my mind it rhymes with Coolio.
Big thanks to RPGnetter WombleHunter for the language power-up. In the same excellent thread one can find my new favorite phrase: "spine-snapping murder-factory", used to describe a half-orc monk's combat capabilities.