as in fraud
one who makes false claims of identity or expertise
don't bother to see that guy, as I've heard he's a quack with no actual training
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Recent Examples of quack
Medallion’s Derek Lo figures that his software can cut through the system’s redundancies, slashing the time and cost of paperwork designed to prevent quacks from practicing medicine and safeguard patients that’s spiraled into something burdensome.
—
Amy Feldman, Forbes.com, 20 Aug. 2025
Tell that to the kids who have been hospitalized and died from measles, following quack Dr. Bobby’s Rx to avoid the shots.
—New York Daily News Editorial Board, New York Daily News, 29 May 2025
And this is why hydropathy was not like many of the other quack medical therapies of the not-quite-modern era.
—John Jeremiah Sullivan, Harpers Magazine, 29 Apr. 2025
There couldn’t a worse choice for the CDC at a time when vaccinations are already being discouraged by such quacks as Florida Surgeon General Joseph Ladapo, who also opposes fluoridation.
—Sun Sentinel Editorial Board, Sun Sentinel, 9 Dec. 2024
See All Example Sentences for quack
Amy Feldman, Forbes.com, 20 Aug. 2025
Tell that to the kids who have been hospitalized and died from measles, following quack Dr. Bobby’s Rx to avoid the shots.
—New York Daily News Editorial Board, New York Daily News, 29 May 2025
And this is why hydropathy was not like many of the other quack medical therapies of the not-quite-modern era.
—John Jeremiah Sullivan, Harpers Magazine, 29 Apr. 2025
There couldn’t a worse choice for the CDC at a time when vaccinations are already being discouraged by such quacks as Florida Surgeon General Joseph Ladapo, who also opposes fluoridation.
—Sun Sentinel Editorial Board, Sun Sentinel, 9 Dec. 2024
See All Example Sentences for quack
Recent Examples of Synonyms for quack
Noun
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The video, shared on Truth Social, also included unsubstantiated voter fraud allegations.—
Terry Collins,
USA Today,
7 Feb. 2026
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Today, the movement is remembered less for enlightenment and more for its crimes – including massive immigration fraud and a mass food poisoning in Oregon in 1984, the largest bioterror attack on American soil.—
Rhea Mogul,
CNN Money,
6 Feb. 2026
Noun
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The overwhelming motive for the early fakes was to provide entertainment — about three-quarters of the images in the exhibition were created for this purpose, Rooseboom said.—
Lianne Kolirin,
CNN Money,
5 Feb. 2026
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Drake had taken a risk, executed the perfect fake.—
Tim Rohan,
NBC news,
5 Feb. 2026
Noun
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The set includes two matching shams, comes in 12 colors, and is on sale for up to 80 percent off.—
Rachel Trujillo,
PEOPLE,
30 Jan. 2026
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The three-piece set comes with a down-alternative comforter and two pillow shams made of 95 GSM polyester for a lightweight, breathable fabric that keeps moisture at bay—perfect for all-season use.—
Alicia Geigel,
Southern Living,
29 Jan. 2026
Noun
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First up was Ben Shapiro, who described Tucker Carlson and others as grifters and charlatans, guilty of misleading their audiences with falsehoods and conspiracy theories.—
Jonathan J. Cooper,
Fortune,
19 Dec. 2025
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Of course, there is also plenty of Trump flattery along with paeans to Robert F. Kennedy Jr. and his cockamamie make-America-sick-again agenda, as one medical charlatan nods to another.—
Mark Z. Barabak,
Mercury News,
10 Dec. 2025
Noun
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The Cult of the Beaver has to fend off pretenders.—
AJ Willingham,
AJC.com,
13 Jan. 2026
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Advertisement Iranians deserve better than the Pahlavi pretender.—
Bobby Ghosh,
Time,
9 Jan. 2026
Noun
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Good afternoon and welcome to Con Con, the convention for swindlers, mountebanks, and the people who love them.—
Henry Alford,
New Yorker,
1 Dec. 2025
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Godard might have come across as a species of poseur – a pretentious, quote-spouting mountebank – but his way of seeing was genuinely new.—
Peter Rainer,
Christian Science Monitor,
13 Nov. 2025
Noun
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To tell the truly venomous from the fakers, there are a couple details to help distinguish the two.—
Kirsten Fiscus,
Nashville Tennessean,
17 Sep. 2025
Noun
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The film tells the true and twisted tale of a deceiver of land and folk, who, defying her birth as a woman, comported herself as a man and committed many a wicked deed.—
Leo Barraclough,
Variety,
20 Jan. 2026
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Islamic eschatology warned of a deceiver who distorts perception, blurring reality.—
Kaif Shaikh,
Interesting Engineering,
15 Aug. 2025
Cite this Entry
“Quack.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/quack. Accessed 9 Feb. 2026.
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