gadfly

      音标：['gædflai]
      n. 形似苍蝇, 牛虻, 讨厌的人
      【医】 虻
      在线英汉词典
gadfly的短语、例句：
      gadfly n 1 fly that stings horses and cattle 虻; 牛虻. 2 (derog 贬) annoying person, esp one who provokes others into action by criticism, etc 惹人讨厌的人（尤指用批评等手段怂恿别人采取行动者）.