Fulkerson, I don't believe there's any Quackish thing you wouldn't do in this cause.
"A Hazard of New Fortunes"
William Dean Howells
Religion and philosophy have been impudent and Quackish-Quackish!
"Marriage"
H. G. Wells
With perfect composure she walked along by the side of this strapping, Quackish young woman dressed in the oddest garments known to the art of dress-making.
"The Goose Man"
Jacob Wassermann