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snake oil salesman

ˌsnake oil ˈsalesman: listen to British English pronunciationˌsnake oil ˈsalesman: listen to American pronunciation noun [C] disapproving

Definition

someone who deceives people in order to get money from them:
He was dubbed a "modern day snake oil salesman" after he ripped off thousands of internet customers.
(Definition of snake oil salesman noun from the Cambridge Business English Dictionary © Cambridge University Press)

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