back seat driver

(noun) a person who criticizes someone’s driving abilities

Example Sentences:

Mom: Turn left! Slow down! Watch out for that car!
Son: Okay mom! Don’t be a back seat driver, I know what I’m doing!

I hate driving with back seat drivers because they make me so nervous.

The back seat driver gave directions to the driver.

Media:

Click to hear a native speaker pronounce at Forvo.com

Similar idioms:

1. as cool as a cucumber
2. basket case
3. a picture paints a thousand words
4. by leaps and bounds
5. at a crossroads
6. all nighter
7. a hill of beans
8. bark up the wrong tree
9. turn to