quackiest

/ˈkwækiɪst/
adjective
  1. Most characteristic of a quack (a person who falsely claims medical skill); most fake or fraudulent in a medical or professional sense.
    • Among all the alternative therapies, his was the quackiest.
    • She avoided the quackiest clinics and went to a real hospital instead.
    • That was the quackiest advertisement for a weight-loss pill I have ever seen.
Antonyms
What does "quackiest" mean? | whatsthatwordmean | whatsthatwordmean