turn someone's head
turn (one's) head
1. To avoid paying attention to something uncomfortable, undesirable, unsafe, or inconvenient. We all knew that what the board of directors was doing was wrong, but we all just turned our heads because we were still profiting from it. Everyone turned their heads when we raised concerns years ago, and look at what happened as a result!
2. To cause someone to suddenly become fixated or infatuated. She spent all summer exercising and changing her eating habits, and she turned everyone's heads when she came back to school that fall.
3. To cause someone to become arrogant, conceited, or self-important. He's a pretty mediocre writer, but getting published in that literary journal seems to have turned his head.
turn someone's headmake someone conceited.
turn someone's head, to
To influence someone’s mind-set, particularly so as to make him or her conceited. Seneca had the idea (and his translator the phrase) almost two thousand years ago (Ad Lucilium): “His head was turned by too great success.”
See also: turn