One who sells by deception; a con artist.
One who sells dubious medicines.
Any boastful, false pretender.
To act as a mountebank.
To cheat by boasting and false pretenses.
A skillful, manipulative person, con artist, or clever scoundrel.
A person who accomplishes tasks with efficiency and grace, especially one with verbal skills who is persuasive in interpersonal relationships, negotiation, etc.