agitator > define

noun

• One who agitates; a political troublemaker.
  • synonyms: fomenter

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