quack

باللغة العربية: دَجَّال، مُشَعْوِذ

1. A fraudulent healer, especially a bombastic peddler in worthless treatments, a doctor who makes false diagnoses for monetary benefit, or an untrained or poorly trained doctor who uses fraudulent credentials to attract patients · That doctor is nothing but a lousy quack!
2. Any similar charlatan or incompetent professional. (figuratively)
3. Any doctor. (slang) · That quack wants me to quit smoking, eat less, and start exercising. The nerve!

الجمع quacks