I consider anything undead to be a zombie (vampires, lich lords, Frankenstein's Monster ...) maybe redefining zombies would be a starting point. (And maybe some big-shot Hollywood director will see this post and take notice... yeah right).
To be fair though, I've been reading Pride and Prejudice and Zombies and I'm liking the total irrelevancy of it (my kind of humour). And I found another good zombie spoof novel this past summer (Night of the Living Trekkies).