An individual in a group of three who is forced to sit alone in the back seat of a vehicle.
Sorry Frank, Jimmy got shotgun. You have to be the back seat bitch.
by Gleasonator August 3, 2011
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someone who is frequently fucked in uncomfortable and awkward places i.e. the backseat of a car
Tyler's mom is a back seat bitch, in fact last night i fucked her in the back of my geo metro. I had a charlie horse all week!
by analboy69x89 October 19, 2008
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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.'"
by AL P 1918 November 12, 2010
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