dem ‧ a ‧ gogue /ˈdeməɡɒɡ $ -ɡɑːɡ/ BrE AmE noun [countable]
[ Date: 1600-1700 ; Language: Greek ; Origin: demagogos , from demos 'people' + agogos 'leading' ]
a political leader who tries to make people feel strong emotions in order to influence their opinions – used to show disapproval
—demagogy, demagoguery noun [uncountable]
—demagogic /ˌdeməˈɡɒɡɪk◂ $ -ˈɡɑː-/ adjective