the.com/agitator
The person who shakes the bottle, then claims they only opened it.
means Someone who stirs up trouble, dissent, or strong feeling — often deliberately and politically.
from From Latin agitare, to drive or set in motion, the relentless cousin of agere, to do; first a literal stirrer, then a stirrer of crowds.
Washing machinesThe spinning center paddle is literally called the agitator.
Army roots1640s English soldiers elected agitators to voice grievances.
Two flavorsOne foments revolution; the other just foments laundry.