Riotous (adjective)

1. Characterized by or given to rioting or violent public disorder.
2. Characterized by or given to uncontrolled or unrestrained behavior or conduct; wildly boisterous.

Origin:

From riot + -ous.

Examples:

1. The party got out of hand and turned into a riotous affair.
2. The crowd was becoming increasingly riotous and the police were called in.
3. The football match ended in a riotous brawl between the opposing teams.
4. The students' behavior was becoming more and more riotous as the night went on.
5. He had a riotous youth but eventually settled down.