Sumbitch is a major character in the Graphic Novel "American Wasteland: Blood and Diesel" by R. D. Hall, Mark Kidwell, and Andrew Mangum. He is called that because it is the only word he can say.
A sumbitch is a derogatory word used by Appalachian hillbillies to degrade a person. It comes from the phrase “son of a bitch; however, the Appalachian hillbillies mispronounced the word and it never ended and is still used to this day.