a noisy, violent public disorder caused by a group or crowd of persons, as by a crowd protesting against another group, a government policy, etc., in the streets.

Law . a disturbance of the public peace by three or more persons acting together in a disrupting and tumultuous manner in carrying out their private purposes.

violent or wild disorder or confusion.

a brilliant display

a riot of color.

something or someone hilariously funny

You were a riot at the party.

unrestrained revelry.

an unbridled outbreak, as of emotions, passions, etc.

Archaic . loose, wanton living; profligacy.

to take part in a riot or disorderly public outbreak.

to live in a loose or wanton manner; indulge in unrestrained revelry

Many of the Roman emperors rioted notoriously.

Hunting . (of a hound or pack) to pursue an animal other than the intended quarry.

to indulge unrestrainedly; run riot.

to spend (money, time, etc.) in riotous living (usually fol. by away or out ). ?

run riot

to act without control or restraint

The neighbors let their children run riot.

to grow luxuriantly or abundantly

Crab grass is running riot in our lawn.