The seat behind the driver. When you miss out on calling "shotgun" and Kennedy, you can call Jackie O. This way you don't have to sit bitch.
She didn't want to sit bitch, because we would make her go skiing, so she called Jackie O. Now Kennedy can't get a handjob.
Jackie O, short for Jackie O'nASSis short for jack ass
Someone cuts you off on the road, you yell "watch it Jackie O"