The name of the person riding in the front passenger seat.
This person is responsible for all duties a driver may have, such as: adjusting heat/air conditioning, windows, changing music, controlling other passengers in the back seat, text messaging/making phone calls, or basically any other task the driver needs to be completed while they are driving.
"If you can't handle the duties of a car bitch, get in the back seat and someone else will do it."
"As soon as you get in that seat you're her car bitch immediately. Don't mess up or you'll be demoted to the back seat."