Mousethief is the title of a character in a kids' book ("Mossflower" by Brian Jacques) whose name is Gonff (Yiddish for "thief") and who is a mouse who steals. A sort of Robin Hood character who steals from the evil wildcat overlords and gives back (since it was stolen from them in the first place) to the woodland critters. But I also identify with the Saturday-morning cartoon character Savoir Faire. :)