troublemaker

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. 鬧事者[表不滿]

The fair coordinator has been given powers to expel suspected troublemakers. 那位公正的協(xié)調(diào)員已被賦予權(quán)力，以驅(qū)逐涉嫌鬧事者。