[ Here, have the long-winded explanation. ]

Pizza is when you take bread dough, roll it out and shape it into a circle with the ends of it rolled up into crusts. You take some tomato sauce, then add your flavor of cheese, either mozzarella, provolone, ec cetera, then put your toppings on it - pepperonis, anchovies, peppers, and the like. Serve it with some kind of drink and enjoy. You have pizza, sir.