Flotzilla is a "monster" created by the band Flotsam And Jetsam. Flotzilla is supposed to kick devil's ass (and doin' it on the first album cover Doomsday For The Deceiver). It was invented to protect the band from "satanic cult" accusations.
Thrasher 1: Jesus man i can see the devil goin' out of my closet!!!
Thrasher 2: Do not worry dude, flotzilla is here!