idiom
C2
to decide what to do based on how things happen, without a plan
I'm not sure what to tell Dad - I'll just have to play it by ear.
아빠에게 뭐라고 말해야 할지 모르겠어요 - 상황을 봐가면서 해야겠어요.
translation
상황에 따라 결정하다