ochlocrat
/ɒkˈlɒkræt/Definitions
1. noun
A leader or ruler who obtains power through the support of the common people or a mob, often characterized by a lack of principle or morality.
“The new politician was accused of being an ochlocrat, using his charisma to manipulate the public opinion.”
2. noun
A person who is tyrannized by the whims of the crowd or a mob.
“The celebrity was criticized for being an ochlocrat, allowing the public’s negative opinions to dictate her actions.”