a back-seat driver

backseat driver

1. A passenger in a vehicle (not necessarily in the backseat) who attempts to instruct the driver or criticize their driving skills. John quickly became annoyed at Mary's tendency to become a backseat driver whenever he drove her somewhere, so he just began to let her drive.
2. By extension, someone who tries to establish and maintain control over every situation. Primarily heard in US. Although Mary was capable of completing the project on her own, John couldn't stop himself from being a backseat driver and telling her what to do.
See also: backseat, driver
Farlex Dictionary of Idioms.

a back-seat driver

COMMON
1. If you call a passenger in a car a back-seat driver, you mean that they keep telling the driver what to do. My mother is a terrible back-seat driver, especially when my sister is at the wheel.
2. If you call someone, especially a politician, a back-seat driver, you mean that they are trying to influence or control a situation that should be controlled by someone else. They accused the former prime minister of being a backseat driver. Note: This expression is used to show disapproval.
See also: driver
Collins COBUILD Idioms Dictionary, 3rd ed.

a back-seat driver

1 a passenger in a vehicle who constantly gives the driver unwanted advice on how to drive. 2 someone who lectures and criticizes the person actually in control of something.
See also: driver
Farlex Partner Idioms Dictionary

a ˌback-seat ˈdriver

(disapproving)
1 a passenger in a vehicle who keeps giving advice to the driver about how he or she should drive
2 a person who wants to be in control of something that is not really their responsibility: There are too many back-seat drivers in this department. This is my project and I’m the one who’s in charge!
See also: driver
Farlex Partner Idioms Dictionary
See also:
  • backseat
  • backseat driver
  • driver
  • I'll thank you to (do something)
  • I'll thank you to do something
  • summon (one) to
  • summon to
  • send (one) on a wild goose chase
  • send on a wild-goose chase
  • (as) cross as a bear
References in periodicals archive
I dread to think what's in store this winter" - Liberal Democrat leader Tim Farron "I'm a back-seat driver in life.
We've never really left each other" Sarah, Duchess of York, above, on her ex-husband, Andrew, Duke of York "I'm a back-seat driver in life.
I date my wife Rock star Alice Cooper I'm a back-seat driver in life.
The 'Driver Distraction' study, commissioned by esure car insurance revealed that 14 per cent of motorists have had an accident or near miss due to being distracted by a back-seat driver.