charlatan

noun2

1. •
   A malicious trickster; a fake person, especially one who deceives for personal profit.

   • That this disgraceful charlatan holds one of the great offices of state in this country should be a source of constant shame and embarrassment to the Prime Minister. — 2018
2. •
   (no longer used) A mountebank, someone who addresses crowds in the street; (especially), an itinerant seller of medicines or drugs.

   • The poor foreigner, more dead than alive, answered that he was an Italian charlatan, who had practised with some reputation in Padua […]. — 1751