Quack

v. i.	1.	[imp. & p. p. Qvacked ; p. pr. & vb. n. Quacking.]
	1.	To utter a sound like the cry of a duck.
	2.	To make vain and loud pretensions; to boast.
	3.	To act the part of a quack, or pretender.
n.	1.	The cry of the duck, or a sound in imitation of it; a hoarse, quacking noise.
	2.	A boastful pretender to medical skill; an empiric; an ignorant practitioner.
	3.	Hence, one who boastfully pretends to skill or knowledge of any kind not possessed; a charlatan. Quacks political; quacks scientific, academical. - Carlyle.
a.	1.	Pertaining to or characterized by, boasting and pretension; used by quacks; pretending to cure diseases; as, a quack medicine; a quack doctor.

Noun	1.	quack - an untrained person who pretends to be a physician and who dispenses medical advice
	2.	quack - the harsh sound of a duck
Verb	1.	quack - utter quacking noises; "The ducks quacked"
	2.	quack - act as a medical quack or a charlatan
Adj.	1.	quack - medically unqualified; "a quack doctor"

QUACK. One, who, without sufficient knowledge, study or previous preparation, and without the diploma of some college or university, undertakes to practice medicine or surgery, under the pretence that he possesses secrets in those arts.
     2. He is criminally answerable for his unskillful practice, and also, civilly to his patient in certain cases. Vide Mala praxis; Physician.

blagueur, bluff, call, carol, caw, charlatanic, charlatanish, chatter, cheep, chirk, chirp, chirr, chirrup, chitter, chuck, cluck, cock-a-doodle-doo, coo, counterfeit, counterfeiter, croak, cronk, crow, cuckoo, drum, fourflusher, fraudulent, gobble, guggle, honk, hoo, hoot, horse doctor, humbug, impersonator, impostor, malingerer, medicaster, medicine man, medicine monger, mountebank, peep, phony, pip, pipe, poser, poseur, pretender, quackish, quacksalver, quackster, ringer, roll, saltimbanco, scold, sham, shammer, simulator, sing, squawk, trill, tweet, twit, twitter, warble, whistle