When you're doing missionary and you lay your sexual partner down on their back and slap down the following ingredients on their belly/cock and or tits.
-Mozzarella
-Pepperoni
-Bell-Peppers
-Marinara Sauce
-Pineapples
Then, The male partner proceeds to jizz on the ingredients, Thus making The-Cock-Pizza
Geo: Bro I just did a cock-pizza on myself yesterday
Stella: I did not need to know that.