Back Seat Driver

People who criticize from the sidelines, much like someone giving unwanted advice from the back seat of a vehicle to the driver.



This comes from the annoying habit of some people of giving unwanted advice to vehicle drivers. It emerged in the USA in early 20th century, as motoring was becoming widespread.



Ex: Shut up and stop being such a backseat driver. I know how to drive!!! Spanish: pasajero conductor



German: ständiger Dazwischenfunker