Messy Pizza

A sexual scenario in which the woman is on her period and penetrated by the male at a high frequency, thus causing blood to spread across her thighs. Once the "sauce" is spread and the male party is reaching climax, he will then pull his penis out (and remove condom if present,) just before ejaculating across her thighs leaving cum dripping down the blood as the "mozzarella cheese" to cover the "sauce".

"Cody totally gave Janet the messy pizza the other night."
"Derek isn't gonna be at the party tonight, he and Paris are busy making messy pizzas."