a penny for your thoughts
US /ə ˈpen.i fɔːr jʊər θɔːts/
UK /ə ˈpen.i fɔːr jʊər θɔːts/
1.
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?
•
She looked lost in thought, so I asked, 'A penny for your thoughts?'