a penny for your thoughts
US /ə ˈpen.i fɔːr jʊər θɔːts/
UK /ə ˈpen.i fɔːr jʊər θɔːts/

1.
무슨 생각해, 생각 좀 말해봐
a way of asking what someone is thinking, especially when they are quiet or seem preoccupied
:
•
You've been quiet for a while, a penny for your thoughts?
한동안 조용했네, 무슨 생각해?
•
She looked lost in thought, so I asked, 'A penny for your thoughts?'
그녀는 생각에 잠긴 듯 보였고, 그래서 나는 '무슨 생각해?'라고 물었다.