gadfly
[ gad-flahy ]
a person who persistently annoys or provokes others with criticism, schemes, ideas, demands, requests, etc.
USE 1
Known as the office gadfly, she constantly challenged the status quo, pushing her colleagues to rethink their approaches.
USE 2
He acted as a gadfly during the workshop, provoking the speaker with sharp questions that stirred thoughtful discussion among the participants.
USE 3
At every city council meeting, the local gadfly would make it a point to question the mayor’s decisions, much to the chagrin of the officials.
