"Ars Moriendi" - also the name ofa song by Black Metal band Marduk, from La Grande Danse Macabre, is in fact Latin. It translates to "The Art of Dying."

By that same token, the words in the song are also Latin. They are, going down:

I've always liked this song. Its extremely manic melody I'd have to characterize as klezmer-zydeco-metal. That's Bungle for yer.