This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. A persistent irritating critic; a nuisance.

n. One that acts as a provocative stimulus; a goad.

n. Any of various flies, especially of the family Tabanidae, that bite or annoy livestock and other animals.

n. Any dipterous insect of the family Oestridae, commonly known as botflies.

n. A horsefly: any of various species of fly, of the family Tabanidae, noted for buzzing about animals and sucking their blood.

n. One who upsets the status quo by posing upsetting or novel questions, or attempts to stimulate innovation by proving an irritant.

n. One who merely irritates without making useful suggestions.

n. A bloodsucker

n. Any dipterous insect of the genus Oestrus, and allied genera of botflies.

n. The popular name of sundry flies which goad or sting domestic animals, as a breeze, breeze-fly, or horse-fly; specifically, a dipterous insect of the family Tabanidæ and suborder Brachycera, representing also a superfamily Hexachætæ.

n. A common though erroneous name of sundry flies (bot-flies) of the family Œstridæ and genus Œstrus or Hippoderma, belonging to a different series of the great order Diptera from that of gadflies proper.

n. Figuratively, one who is constantly going about; a mischievous or annoying gadabout.

n. a persistently annoying person

n. any of various large flies that annoy livestock

"Being a gadfly is certainly a role, and occasionally a helpful one."

black-striped gadfly    american gadfly    mexican gadfly    black gadfly   

fly    breeze    gadbee    clog   

hardback    fatso    whippersnapper    thoughit    ill-thought-out    petulancy    withoutthe    womaniser    audiovisual    positivistic