Here's how it works:
Take a well-known book, song or movie and tweak the title (if you have to) so that it would fit nicely into the zombie genre eg: Who's eating Gilbert Grape?; Eat the Robinsons; or my personal favorite from Twitter's #zombiesongs tag, Braindrops Keep Falling on my Head.
If you can't think of a zombie one, feel free to make it about vampires, werewolves or any other
horror creature, but make sure you say which one - you know how easily I get confused.
Have fun, and if the we're all still here later, come back and check on what other folks have thought up :)