The Collaborative International Dictionary
Quackish
Quackish \Quack"ish\, a.
Like a quack; boasting; characterized by quackery.
--Burke.
Wiktionary
quackish
a. Like a quack (fraudulent doctor), or characteristic of quackery.
Usage examples of "quackish".
When I threw it all over and retired, Foley, I went to a doctor, the least quackish I could find.