N-COUNT
(總是煽動事端的)狂熱分子;(尤指)政治煽動者
If you describe someone as a firebrand, especially someone who is very active in politics, you mean that they are always trying to make people take strong action.
例句
...his reputation as a young firebrand.
他作為一名年輕的政治煽動者的名聲