잉글리쉬쇼핑

A head-scratcher

• 
  의미:
  (머리를 긁적이게 하는) 완전히 복잡하거나 어려운 수수께끼나 해결하기 어려운 문제, 불가사의한 문제
  
  예시:
  Given its unusual blend of fact and fiction, the film is a real head-scratcher.
  Where he fits in, and for whom, is the real head-scratcher.