Wagon - Covered Blumpkin

A maneuver in which a female gives oral sex to a male whilst he is defecating, while she has a sheet over her head thus trapping odor as well as any backsplash. The etymology is based on the fact that this maneuver, when properly set up and executed, resembles a pioneers wagon.

I was in a rush so I had to kill two birds with one stone and get a wagon - covered blumpkin from your mom this morning.