a fish out of water
US /ə fɪʃ aʊt əv ˈwɔtər/
UK /ə fɪʃ aʊt əv ˈwɔtər/

1.
離水的魚, 格格不入
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.
當我搬到大城市時,我感覺自己像一條離水的魚。
•
He was clearly a fish out of water at the formal dinner party.
在正式晚宴上,他顯然像一條離水的魚。