When it comes to describing someone who is badly behaved, there are plenty of synonyms to choose from. Some common ones include "disobedient," "unruly," "insubordinate," "naughty," "mischievous," and "ill-mannered." These words all suggest a lack of respect for authority or rules. Other possible synonyms might include "undisciplined," "boisterous," "rowdy," "wild," or "rebellious." However, the specific definition and connotation of each word may vary slightly. For example, "disobedient" implies a refusal to follow directions, while "wild" implies a lack of restraint or control. Whatever word you choose, make sure it accurately captures the behavior you are trying to describe.