The fourth best position when travelling in a car or ute. In the usual order, from best to worst, the seats are: driver, shotgun, wingman (behind shotgun), backseat driver (behind the driver), bitch (if it exists), hump, and bed.
Contrary to
popular belief, the hump is not the seat between driver and shotgun. That is
the bitch seat. The hump is located behind
the bitch seat, where there often is a hump in the floor, thus the name.
Joe: "Shotgun!"
Mike: "Well, then, I take
wingman."
Bill: "I'm
too tall for backseat driver or hump, so I take bitch. Put
the dog in the cargo bed."