also backseat driver
( back-seat drivers)
1.
If you refer to a passenger in a car as a back-seat driver , they annoy you because they constantly give you advice.
N-COUNT [ disapproval ]
2.
If you refer to someone, especially a politician, as a back-seat driver , you disapprove of them because they try to influence a situation that does not concern them.
They accused the former prime minister of being a backseat driver.
N-COUNT [ disapproval ]