The word "unruly" describes behavior that is wild, uncontrolled or out of control. It can refer to a person who is difficult to manage and behaves in an unpredictable manner, often defying authority or rules. The term can also be used to describe disorderly conduct, such as rioting or other forms of social upheaval. In essence, "unruly" suggests a lack of discipline, orderliness or restraint, and is typically used in a negative context to describe behavior that is considered undesirable or unacceptable.