Meaning of gadfly

gad•fly

Pronunciation: (gad'flī"), [key]
— pl. -flies.
  1. any of various flies, as a stable fly or warble fly, that bite or annoy domestic animals.
  2. a person who persistently annoys or provokes others with criticism, schemes, ideas, demands, requests, etc.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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