Wiktionary
backseat drivers
n. (backseat driver English)
Usage examples of "backseat drivers".
Gray had a violent thought about backseat drivers, but he kept it to himself.
I've been traveling for four days with two temperamental backseat drivers.
All she was concentrating on was his steering, which, like most backseat drivers, she apparently found execrable.
As usual, the two players were surrounded by backseat drivers, and we all looked up with a start as Bert's blast whammed overhead.