RINGLEADER n.
Opprobriously, a leader of a body of men engaged in the violation of law or in an illegal enterprise, as rioters, mutineers, or the like. The ringleaders were apprehended, tried, fined, and imprisoned. Macaulay.
RIOT v.
To engage in riot; to act in an unrestrained or wanton manner; to indulge in excess of luxury, feasting, or the like; to revel; to run riot; to go to excess. Now he exact of all, wastes in delight, Riots in pleasure, and neglects the law. Daniel. No pulse that riots, and no blood that glows. Pope.