A sexually deviant act where a man takes a roll of dough and rolls it into the shape of a pizza crust. He then proceeds to jerk off, shit on, and then spit on, the pizza. Rolling into a kind of burrito form, he then jams it into a girl's vagina in a harsh manner, adding the "sauce" needed to complete the pizza roll.
Yo son, did you hear about why Jenni's walking all funny? Brad did her a Pizza Roll!