Definition from Wiktionary, the free dictionary
firebrand (plural firebrands)
- An argumentative troublemaker or revolutionary; one who agitates against the current situation.
- The member of the college's Communist League was a firebrand who would launch a sit-in or protest march at a moment's notice.
- A torch or other burning stick with a flame at one end.
- The crowd cheered as a firebrand was tossed on the huge pile of wood to start the traditional homecoming bonfire.
argumentative troublemaker or revolutionary