Definitions:

1. Refers to inappropriate, disruptive, or unacceptable actions that go against rules, social norms, or expected conduct. NOUN
   • The teacher addressed the student's misbehaviour to maintain classroom discipline.
2. Refers to the act or conduct of behaving improperly, inappropriately, or in an unacceptable manner. NOUN
   • His misbehaviour at the meeting disrupted the professional atmosphere.

Synonyms:

• bad behavior
• disobedience
• misbehavior
• mischief
• misconduct
• misdeed