This is a form of a zombie, that instead of craving meat/fish/poultry, it craves nothing but vegetables, eggs, and dairy products. It's main course that it desires is a salad, since it's usually heard walking around saying "salad".

No one knows exactly sure how the evolution of vegetarian zombies occurred, but some suspect that when the person got infected and became a zombie, this person was a vegetarian, so their eating habits carried over.

When you eat dirt for the first time and leave your family to build a shack in the woods