(be/feel) like a fish out of water
From Longman Dictionary of Contemporary English(be/feel) like a fish out of water(be/feel) like a fish out of waterUNPLEASANTto feel uncomfortable because you feel you do not belong in a place or situation I felt like a fish out of water in my new school. → fishExamples from the Corpus(be/feel) like a fish out of water• I felt like a fish out of water.• In his first interview since the move, he still looks like a fish out of water.