A xxx is… who does…
失控

A backseat driver is a passenger who tells the driver how to drive.
后座司机是那种对你开车指手画脚的乘客。

A cat is a small animal that has four legs and fur.
猫是有四条腿和毛的小动物。

Give unwanted advice
给多余的建议，瞎给建议

I already told you I know what to do. Stop giving me unwanted advice.
我说了我知道该做什么。别瞎给多余的建议了。

This old guy at work keeps giving unwanted advice to everyone. He thinks he knows everything.
公司的这个老人总是给大家些多余的建议。他觉得自己什么都知道。