gadfly
noun /ˈɡædflaɪ/
/ˈɡædflaɪ/
(plural gadflies)
(usually disapproving)- a person who annoys or criticizes other people in order to make them do something
- He was a political gadfly, turning up at city council meetings and complaining about the waste of taxpayers’ money.
Word Originlate 16th cent.: from gad, or obsolete gad ‘goad, spike’, from Old Norse gaddr, of Germanic origin; related to yard, the unit of measurement.