When we heard that we weren't supposed to refer to the zombies in "World War Z" as, well, zombies, we were perplexed. After all, isn't that undead appeal part of the reason why the original book and now the film exist?
But who were we to question the studio. So, if not zombies, then what could the titular 'Z' stand for? After much intense speculation, we came up with the following possibilities and, for added interest, made .gifs of Brad Pitt running away from them.