Quack

/kwæk/

Meaning & Definition

noun
a fraudulent or incompetent doctor or healer.
The patient realized too late that he had been treated by a quack who had no medical qualifications.
a person who pretends to be something they are not, especially in a profession.
The quack managed to fool many people with his impressive-sounding but false claims.
verb
to make the characteristic sound of a duck.
The children laughed as they listened to the ducks quack at the pond.
to talk or behave in a way that is foolish or nonsensical.
He tends to quack about conspiracy theories that have no basis in fact.

Etymology

Originally from Middle Dutch 'quacken', likely imitative of the sound made by ducks.

Common Phrases and Expressions

quack medicine
Health treatments that lack scientific support.
quack doctor
A physician who pretends to have medical qualifications they do not possess.

Related Words

charlatan
A person who falsely pretends to have knowledge or skill.
imposter
One who deceives by pretending to be another.

Slang Meanings

A person who offers misleading health advice.
Don't listen to that quack; he doesn't know what he's talking about.
To fool someone with false promises.
The salesman was just quacking out lies to make a sale.