gadfly
Americannoun
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gadflies
plural
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any of various flies, as a stable fly or warble fly, that bite or annoy domestic animals.
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a person who persistently annoys or provokes others with criticism, schemes, ideas, demands, requests, etc.
noun
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any of various large dipterous flies, esp the horsefly, that annoy livestock by sucking their blood
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a constantly irritating or harassing person
Usage
What does gadfly mean? A gadfly is a person who’s always hanging around and annoying people with criticism, demands, and questions. Basically, the kind of person you want to shoo away like a biting insect. Speaking of which ... The literal meaning of gadfly refers to any of several types of flies (such as stable flies or warble flies) that are known for pestering livestock by biting them and sucking their blood. Example: Don’t mind him—he’s just a gadfly who comes to every council meeting to request that the town pay to put a trampoline park in his backyard.
Other Word Forms
Noun Inflected Forms
Etymology
Origin of gadfly
Explanation
A gadfly is an irritating person, a nuisance who will often ask too many questions or lob lots of criticisms in order to get his or her way. Gadfly can also refer to an actual fly. The next time you see a cow swatting at the air with her tail, look closer because she might actually be shooing away an annoying gadfly. This is any kind of fly that likes to pester, and even bite, livestock. The prefix gad is an old word for “spike” or “pointed stick” which can be thought of, in this case, as similar to a stinger. So if your office mate is continuously buzzing around your desk with stinging comments, call him a gadfly and try to shoo him back to his own desk.
Vocabulary lists containing gadfly
The Vocabulary.com Top 1000
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"Letter from Birmingham Jail" by Martin Luther King, Jr. (1963)
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The Immortal Life of Henrietta Lacks
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
See Examples For:
One group was inspired by Justin Shubow, a gadfly who has made a career out of opposing modern architecture, and bankrolled by Thomas Klingenstein, chairman of the conservative Claremont Institute.
From The Wall Street Journal ● Jun. 13, 2026
That’s because in Austin, Harrison is viewed as a gadfly, with few legislative victories or allies.
From Salon ● Oct. 16, 2025
The publication was founded in 1955 by the legendary gadfly William F. Buckley Jr. as a salon for the various right-leaning fraternities in American life: fire-eating libertarians, orthodox Catholics, conspiratorial anti-communists.
From Slate ● Apr. 25, 2025
You know that gadfly Lady Whistledown’s voice is none other than that of Dame Julie Andrews.
From Los Angeles Times ● Nov. 3, 2024
In various court documents, judges described Cofield as a “con artist,” “no more than a gadfly and an exploiter of the court system,” and “the most litigious inmate in the system.”
From "The Immortal Life of Henrietta Lacks" by Rebecca Skloot
The Legislature was coming after the gadflies like Gilbert.
From Salon ● Aug. 17, 2025
As is quite common for these kinds of third-party gadflies, Oliver has made a career out of running unsuccessfully in multiple federal elections.
From Slate ● Mar. 12, 2024
Most of the seats during the Anaheim council meeting I attended did end up getting filled — but it was the usual assortment of lobbyists, gadflies, local activists, and happy, mysterious men in sharp suits.
From Los Angeles Times ● May 19, 2022
He identified six tactics, the first five being “doubt the science,” “question scientists’ motives and integrity,” “magnify disagreements among scientists and cite gadflies as authorities,” “exaggerate potential harm” and “appeal to personal freedom.”
From New York Times ● Jul. 14, 2021
It has even happened that animals have been so seriously attacked by gadflies that they have died from loss of blood.
From From Pole to Pole A Book for Young People by Sven Anders Hedin
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
