I vaguely recall the details of a Deadpool comic book issue I read around 4-5 years ago. Here are a few details I remember:
Deadpool eats a load of chimichangas during a zombie apocalypse and completely sleeps through the zombie takeover.
When he wakes up, he consumes some sort of serum and lets the zombies eat him. But after eating him, all the zombies turn into Deadpool clones.