(noun) A leader or speakerwhostirsup the passions of the masses; a demagogue.
Use "rabble-rouser" in a sentence
"Putting on a jacket was already a big step for Mr. Leung, who usually wears a Che Guevera T-shirt and is known as a rabble-rouser."
"Just like you coming on here and trying your damnedest to be a rabble-rouser amuses you."
"Though he often exhibits dangerous, left-wing, rabble-rouser predilections; Mr. Herbert has neither the following nor the organizational skills necessary to form a cohesive and hostile, Rabble-Rousing Unit."