1. resembling or characteristic of a quack doctor; fraudulent or pretentious in medical practice
Usage: often derogatory

Examples

• The quackish remedies promised miraculous cures with no scientific backing.
• His quackish behavior made patients question his medical credentials.
• The advertisement had a quackish tone that raised red flags.
• She avoided the quackish clinic and sought treatment at a reputable hospital.
• The quackish practitioner sold expensive but worthless supplements.