When you doing a ho' doggystyle hard, you punch her in the head and knock her out cold. then you take a dump on her stomach/chest and sit on and then roll all over her body like a steamroller, covering herin feces. then you leave and hope you never see her agan.
During sexual intercourse one partner may deficate on the others chest. This is known as the cleveland steamer. In addition to pooping they might also roll over the feces on their partner and get it all over their bodies, this is known as a cleveland steamroll. It is a sign of love and affection.
Claire was embarrassedthe following morning in biology class when she found out that Carl had told his friends that he had performed the Cleveland Steamroller on her last night.