Keep your nose clean

Do you know the English expression “keep your nose clean“? Read the conversation below. Can you guess the meaning?

Emily: Some of my co-workers have been leaving work early when the boss is out. 

Kelly: Have you been doing that too?

Emily: No, I want a promotion, so I must keep my nose clean.

Does it mean:

a) make sure your nose is clean

b) don’t do anything wrong

c) work for a promotion

d) don’t do anything strange

The answer is below! ↓

 

Answer: b) don’t do anything wrong