back-seat driver
noun /ˌbæk siːt ˈdraɪvə(r)/
/ˌbæk siːt ˈdraɪvər/
(disapproving)- a passenger in a vehicle who keeps giving advice to the driver about how he or she should driveTopics Transport by car or lorryc2
- a person who wants to be in control of something that is not really their responsibility