troublemaker /ˈtrʌbəlˌmeɪkə/ TEM4

• 1. 

  N-COUNT If you refer to someone as a troublemaker, you mean that they cause unpleasantness, quarrels, or fights, especially by encouraging people to oppose authority. 闹事者 [表不满]

  例：

  The fair coordinator has been given powers to expel suspected troublemakers.

  那位公正的协调员已被赋予权力，以驱逐涉嫌闹事者。