Any of the seats in the rear of a vehicle.

plural of back seat

Alternative spelling of back seat

(idiomatic) To adopt a position of noninvolvement. / (idiomatic) To be second to someone or something; to be less important or have a lower priority.

A person sitting (typically) in the back seat of a car issuing (unsolicited and usually unwanted) instructions to the driver.

plural of back-seat driver

Excessive commenting on the actions and decisions of someone playing a video game, by an individual who is not playing the game.

present participle of back-seat game

(automotive) The action of excessively commenting on the actions and decisions of someone operating a motor vehicle, by an individual who is not operating the vehicle, in an attempt to control the vehicle.

present participle of back-seat drive