a leader who inspires the populace with speeches and actions that inflame their prejudices and passions rather than through reasoning.
► uses
Uses:
Do you know that the orange lodges agitated for repeal of the union twenty years before O'Connell did or before the prelates of your communion denounced him as a demagogue? You fenians forget some things.
James Joyce. Ulysses.
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From time to time, parties re-sole their old insults. In 1832, the word bousingot formed the interim between the word jacobin, which had become obsolete, and the word demagogue which has since rendered such excellent service.