Top Definition
Auto ventriloquism is the art of talking or signing to oneself without moving one's lips while driving an automobile.
Passenger: "Hey, look at the guy in the car next to us. What an uptight douche bag."

Driver: "He's not uptight, man. Look you can see his lips moving a little. He's practicing auto ventriloquism."
by rufusclay November 09, 2013

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