quack

IPA: kwˈæk

The sound made by a duck.
(derogatory) A fraudulent healer, especially a bombastic peddler in worthless treatments, a doctor who makes false diagnoses for monetary benefit, or an untrained or poorly trained doctor who uses fraudulent credentials to attract patients
(figuratively, derogatory) Any similar charlatan or incompetent professional.
(humorous slang, mildly derogatory) Any doctor.

To make a noise like a duck.
(intransitive) Of a queen bee: to make a high-pitched sound during certain stages of development.
To practice or commit quackery (fraudulent medicine).
(obsolete) To make vain and loud pretensions.

Examples of "quack" in Sentences

The quack is your sit, stay and heel of duck calling.
One the quack is perfected, the greeting call can be made by dragging the quack out.
Just as you go back to the basics when problems crop up with your duck dog, the quack is your initial point of reference with your call.
The perfect quack is a function of four things working simultaneously: lip formation, vocalization, hand movement and diaphragm manipulation.
Hence the term quack-salver was commonly used in the seventeenth century, signifying an ignorant person, who was wont to extol the curative virtues of his salves.
Quack did I move too much, quack did the dog move, quack is there not enough camo on my face, quack are the guns too shiny, quack are my decoys in the wrong spot, quack is the blind okay, QUACK GET READY THEIR COMING BACK! .......
The term quack actually comes from the word quicksilver and refers to the so called early drug doctors and piss prophets refers to those who drew the astrological figure or a sick person, his urine being brought to the physician at that moment in time to represent part of his body.