伤脑筋

傷腦筋
shāngnǎojīn
  1. to be a real headache
  2. to find sth a real headache
  3. to beat one's brains

CEDICT

Entry Composition

1 伤 shāng
  1. to injure
  2. injury
  3. wound
2 脑筋 nǎojīn
  1. brains
  2. mind
  3. head
  4. way of thinking