Not terms I personally use, but have heard/read: pootang, lunch box, box - in fact there's a book bearing this title, entirely devoted to this topic - fur pie, all beef taco, fish taco (don't ask where that came from - didn't ask, don't wanna know), poo-nanny/nonny (spelling may vary), poon, oo-hoo, & smelly beaver.

Word I use: cunt.