Back-Seat Baby 

A baby conceived from having sex in a car, usually, but not limited to, the backseat.

Because Ricky and Charlotte have only had sex once, in the back-seat of his car, and she is now pregnant, her child would be considered a Back-Seat Baby.

Back-Seat Baby by Charlotte Lyons March 21, 2009

back seat baby 

Term meaning WHORE when there are seven year olds in the room.

"You don't want your identity to be the biggest back seat baby in the school."

back seat baby by VapoRub Baby May 10, 2006

backseat babysitter 

When you're the person who's sitting in back with another person or persons you don't know too well or just met, and you have to entertain /talk to them. #wishiwasinthepassengerseatcuzthisisawkward

Friend 1: I'm mad at my Mike.
Friend 2: Why?
Friend 1:
Because I had to be the backseat babysitter to that random while ya'll sat in front chillin.
Friend 2: That was Brandon
Friend 1: I don't f******know him tho!

backseat babysitter by BitchyGoose June 15, 2019