Backseat driver
The phrase "backseat driver" refers to someone who constantly offers unsolicited advice or criticism to the person who is driving a vehicle. This term is metaphorical, as it originally referred to a person sitting in the backseat of a car and instructing the driver on how to navigate and operate the vehicle. It is often used to describe someone who is overly controlling, nitpicky, or bossy about someone else's actions or decisions, particularly regarding driving or any other activity.
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