Ancillary Rules of Calling Shotgun in a Vehicle
2.9 Alternate Seats – Riding Bitch
Once the Shotgun seat has been called by someone, the other less prestigious seats in the car may be claimed using the same rules as calling Shotgun. Example: you can say "back-right" or "window". 2.9.1 Riding Bitch You may also call negations, such as "not back-center" which would put you in any seat except for [...]