An acceptable term to call someone when set person is not being a real moron, though you are frustrated and/or stressed thus proceed to tell them off while avoiding proper syntax.
*Three people driving in a town looking for the highway*
Passenger 1: I don't think we were supposed to turn there!
Passenger 2: Yeah this was a bad idea, you're a bad driver.
Driver: Shu-Shit! Shut up you fuck-morons!