Pizzajerky 

Pizza that is very dry and tough. Usually occurs when leftover slices are left in the box and forgotten about until days later. Some still find it edible, and refer to it as pizzajerky.

I was too lazy to cook so i just snagged some pizzajerky out of the garbage.

Pizzajerky by robhk888 December 9, 2007

Pizza-jerky 

Culinary euphemism pertaining to a week-old slice of pizza that the DOG wouldn't touch, when one is REALLY hungry.

Commonly associated with student or bachelor life-styles...

"Being completely out of Ramen-noodle soup, Dave had pizza-jerky for breakfast".

Pizza-jerky by StangFtl February 1, 2010