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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Lindell bragged of spending millions to combat election fraud.—
Rachel Royster,
Fort Worth Star-Telegram,
28 Mar. 2026
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Banks are required by law to report suspicious activity in customer accounts to federal authorities in order to flag potential criminal activity, such as money laundering or fraud.—
CBS News,
CBS News,
28 Mar. 2026
Noun
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McEnelly played defense the rest of the way, mixing in fakes where needed to keep Welsh at bay.—
Twin Cities,
Twin Cities,
22 Mar. 2026
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People may just give up on trying to sort the real from the fake.—
Nick Dothée,
The Atlantic,
22 Mar. 2026
Noun
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The gauzy texture is made from organic cotton, and the decorative pillow shams have a highly dimensional stitching.—
Julia Harrison,
Architectural Digest,
20 Mar. 2026
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Bedsure Best Seller GentleSoft Pintuck Pinch Pleat For a one-and-done bedding upgrade, consider this set that includes sheets, a comforter, pillowcases, and shams, all for just $45.—
Jacqueline Tempera,
Better Homes & Gardens,
16 Mar. 2026
Noun
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The 21st century’s obstacles for young men—as seen in deaths of despair and lagging employment—have been amply publicized both by credible journalists and by charlatans such as Fuentes.—
Spencer Kornhaber,
The Atlantic,
27 Mar. 2026
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Carl Sagan's baloney detection kit taught us how to separate good science from the work of charlatans.—
Big Think,
Big Think,
10 Feb. 2026
Noun
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The alliance successfully supported Maria Cristiana, who was acting as regent for Isabella II in Spain and had allied herself with the liberals against the pretender Don Carlos in the First Carlist War (1833–39).—
Encyclopedia Britannica,
Encyclopedia Britannica,
2 Apr. 2026
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These two pretenders reflect an insider debate whose subject is not the existence of the Islamic Republic but the best method of its survival.—
Karim Sadjadpour,
The Atlantic,
4 Mar. 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 3 Apr. 2026.
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