backseat driver noun
plural backseat drivers
plural backseat drivers
Learner's definition of BACKSEAT DRIVER
[count]
1
: a passenger in a car who gives driving advice to the driver对驾驶员指手画脚的乘客
2
: someone who gives unwanted advice or who tries to control something that is supposed to be controlled by another person对别人指手画脚的人;越权行事者