back-seat driver

noun
1
a passenger in a vehicle who keeps giving advice to the driver about how they should drive
سرنشین مزاحم, فردی که در هنگام مسیر رانندگی نصیحت می‌کند
2
a person who wants to be in control of something that is not really their responsibility
مداخله‌گر بیرونی, راننده‌ی کنار نشین, آمر بی مسئولیت