The middle seat in a truck, el camino, or car. Normally where the girl sits when you have 2 men and 1 woman in a front-seat formation. Occasionally, however, the awkward situation will arise where you have 3 males who must sit in the same front seat.
driver: well i guess we have to go in my truck
person 2: i call bitch seat
person 3: why would you call bitch seat you queer?
person 2: you are right, that was stupid of me