N-COUNT
闹事者;捣乱分子;(尤指）煽动作乱者
If you refer to someone as a troublemaker, you mean that they cause unpleasantness, quarrels, or fights, especially by encouraging people to oppose authority.
例句
The regional governor has been given powers to outlaw strikes and expel suspected troublemakers.
地方长官被赋予禁止罢工、驱逐嫌疑闹事者的权力。