frondeur
noun
fron·deur frōⁿ-ˈdər 
: rebel, malcontent
Example Sentences
Recent Examples on the Web At the end of January, Valls was defeated in the Socialist Party race by Benoît Hamon, a dapper frondeur, a member of a rebel faction. 
Elisabeth Zerofsky, The New Yorker, 8 Feb. 2017
Elisabeth Zerofsky, The New Yorker, 8 Feb. 2017 Word History
Etymology
French, literally, slinger, participant in a 17th century revolt in which the rebels were compared to schoolboys using slings only when the teacher was not looking
First Known Use
1798, in the meaning defined above