Be Naughty' is a term used to describe behaving in an unacceptable manner. The crossword solutions for this term are MISBEHAVE, TRANSGRESS, ACTUP, DISOBEY, and HORSEAROUND. MISBEHAVE means to behave badly or inappropriately, while TRANSGRESS means to violate a law or rule. ACTUP refers to acting in an unruly or disruptive manner, DISOBEY means to refuse to comply with an order or rule, and HORSEAROUND means to play rough or act in a boisterous way.