Like a quack (fraudulent doctor), or characteristic of quackery.
quackism
quackism
noun
Behaviour of a quack; quackery.
quickens
quickens
noun
(chiefly Midlands (northern), Northern England, Northern Ireland, Scotland) Synonym of couch grass (“a species of grass, Elymus repens”); also, the underground rhizomes of this, and sometimes other grasses.