Gadfly meaning

gădflī
Frequency:
A person who annoys others, esp. by rousing them from complacency.
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A persistent irritating critic; a nuisance.
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One that acts as a provocative stimulus; a goad.
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Any of various flies, especially a warble fly, botfly, or horsefly, that bite or annoy livestock and other animals.
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Any of several large flies, as the horsefly, that bite livestock.
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Any of various flies, especially a warble fly, botfly, or horsefly, that bite or annoy livestock and other animals.
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Any dipterous insect of the family Oestridae, commonly known as botflies.
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A horsefly: any of various species of fly, of the family Tabanidae, noted for buzzing about animals and sucking their blood.
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One who upsets the status quo by posing upsetting or novel questions, or attempts to stimulate innovation by proving an irritant.
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(pejorative) One who merely irritates without making useful suggestions.
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(slang) A bloodsucker.

He's a regular gadfly and takes advantage of his friend's generosity.

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Origin of gadfly

  • gad fly

    From American Heritage Dictionary of the English Language, 5th Edition

  • "fly which bites cattle", from Old Norse gaddr (“spike”).

    From Wiktionary