Impudent
The term "impudent" describes behavior that is boldly disrespectful or shameless. It often refers to someone who shows a lack of respect for authority or social norms, acting in a way that is brazen or cheeky. This attitude can be seen in various situations, such as a child speaking back to a parent or an employee challenging a boss inappropriately.
Impudence can be perceived negatively, as it undermines social etiquette and can lead to conflict. In literature and media, characters displaying impudent traits often serve as comic relief or as antagonists, highlighting the tension between authority and rebellion.