be on your best behaviour
US /bi ɑn yʊər bɛst bɪˈheɪvjər/
UK /bi ɑn yʊər bɛst bɪˈheɪvjər/
1.
최선을 다해 행동하다, 예의 바르게 행동하다
to act in the most polite and proper way possible, especially in a situation where you want to make a good impression
:
•
When you meet my parents, I expect you to be on your best behaviour.
우리 부모님을 만날 때는 최선을 다해 행동해야 해.
•
The children were told to be on their best behaviour during the school trip.
아이들은 수학여행 동안 최선을 다해 행동하라고 들었다.