a fish out of water
US /ə fɪʃ aʊt əv ˈwɔtər/
UK /ə fɪʃ aʊt əv ˈwɔtər/
1.
a person who is in an unfamiliar or uncomfortable environment
:
•
When I moved to the big city, I felt like a fish out of water.
•
He was clearly a fish out of water at the formal dinner party.