Agitator
WordNet
noun
(1) One who agitates; a political troublemaker
WiktionaryText
Noun
- One who agitates; one who stirs up or excites others; as, political reformers and agitators.
- An implement for shaking or mixing.
- One of a body of men appointed by the army, in Cromwell's time, to look after their interests; called also adjutators.