It is a nickname given by homosexual cowboys from the south to their fellow gay cowboys from the north. It comes from William Tecumseh Sherman, a Union general during the Civil War's nickname, cump, and cum dumpster. It is used as a flirty way to get into another cowboy's pants at the ranch.
Ceejay: Shucks, Andy, gonna make you into my Cump Dumpster when you come down to Atlanta.

Grant: Dang twang, fill my butthole with your cum, boy.
by HandleBrake12 October 15, 2019
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