The person in a group who isn't a leader, on the contrary, because this person is a bitch, all this person does is take orders and defer responsibility to the actual leader. For this reason, this person never has to deal with anything that resembles a "high pressure" situation which- at least in their minds- is good because a high pressure situation would cause this person to crack and undoubtedly fail.
"'Did you guy's hear about LeBron James goin' to Miami to play with Dwayne Wade?'
'Yeah I saw that SI cover where LeBron is standing behind Wade. LeBron is such a back seat bitch.'"
A very ugly girl who sits in the backseat of the car when she is out with friends because she is too ugly to sit in the front seat where she would be seen much easier by people outside the vehicle
Hey Jenny! Come sit in the front seat before Barb gets here because I don't want that backseat bitch cramping my style.
Someone who is always putting themselves in another persons business/conversation. They have tendencies to jump from the backseat, never understanding what’s going on in the road or the front seat.
You should really try minding your business, you’re such a backseat bitch.