Stirrer

n.

1.

One who, or that which, stirs something; also, one who moves about, especially after sleep; as, an early stirrer. Stirrer up an instigator or inciter. - Atterbury.

Noun	1.	stirrer - a person who spreads frightening rumors and stirs up trouble Synonyms: scaremonger
	2.	stirrer - an implement used for stirring

alarmist, excite, scaremonger, shake, shake up, stimulate, stir