rabble-rouser
noun [ C ] uk/ˈræb.əlˌraʊ.zər/ us/ˈræb.əlˌraʊ.zɚ/
（尤指按自己的想法）煽动暴乱者，蛊惑人心者
a person who makes speeches that make people excited or angry, usually intentionally in order to make them act in a particular way
Johnson was unpopular with the management because he was a well-known rabble-rouser. 管理层很不喜欢约翰逊，因为他是出了名的煽风点火者。