Michigan Monkeypie

When a girl holding a hidden grudge shits in her hands without the guy knowing, and continues to smear it on the back of the guy during sexual intercourse. Usually done out of anger.

Adam: "Dude! I gave that chick an Alabama Hotpocket last weekend and she was NOT loving it.."

Chase: "Haha! That must be why she gave you a Michigan Monkeypie!"

Adam: (checking his back) "Wait, wha..? --GROSS!"