flummox

• Meaning: (informal) to confuse, perplex
  
• In Hong Kong slang: 搞到一舊雲， 搞到抓晒頭
  
• In decent Chinese: 擾亂思想， 干擾視線， 令人混亂， 叫人困惑
  
• Where we first met: BBC film info on Insomnia (2002) - Al Pacino gets to 'the site of a murder that has the local authorities flummoxed.'