Zombie cheese is created when Green Cheese is left to fester for a little too long. When this happens, the cheese looses its killing stench, and engulfs the nearest thing to it, be that apples, biscuits, or (heaven forbid) generic cereal, destroying it entirely and adding it to its mass. This cycle repeats itself many times until the cheese has either engulfed everything on the shelf, been doused with holy water, or been sent to the moon .