back-seat driver

noun

1. 对驾驶者指手画脚的乘客
   a passenger in a vehicle who keeps giving advice to the driver about how he or she should drive
2. 企图越权者
   a person who wants to be in control of sth that is not really their responsibility

1. 对驾驶员指手画脚的乘客
   If you refer to a passenger in a car as a back-seat driver, they annoy you because they constantly give you advice.
2. N-COUNT （尤指政客中）企图越俎代庖的人，干涉与己无关之事的人
   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.
   1. They accused the former prime minister of being a backseat driver.
      他们指责前首相越俎代庖。

1. My assistant has become a bit of a back-seat driver and it's getting on my nerves.
   我的助手已变得有些多管闲事，因而使我觉得很是不安。
2. No one likes Daphne because she's a back-seat driver.
   没人喜欢达芙妮，因为他是个后座司机。
3. Don't ask Peter about the work, he's a back-seat driver.
   不要向彼得问有关这项工作的事，他是多管事的人。