ri·ot 
(rīət)
(rīət)n.
1. A wild or turbulent disturbance created by a large number of people.
2. Law A violent disturbance of the public peace by three or more persons assembled for a common purpose.
3. An unrestrained outbreak, as of laughter or passions.
4. A profusion: The garden was a riot of colors in August.
5.
a. Unrestrained merrymaking; revelry.
b. Debauchery.
6. Slang An irresistibly funny person or thing: Isn't she a riot?
v. ri·ot·ed, ri·ot·ing, ri·ots
v.intr.
1. To take part in a riot.
2. To live wildly or engage in uncontrolled revelry.
v.tr.
To waste (money or time) in wild or wanton living: "rioted his life out, and made an end" (Tennyson).
[Middle English, from Old French, dispute, from rioter, to quarrel, perhaps from ruire, to roar, from Latin rūgīre.]
riot·er n.