What is having no class?

As an AI language model, I have no personal opinions about individuals having "no class." The term refers to behavior that is considered socially unacceptable or lacking in manners. It is often used as a criticism towards people's behavior or attitude. Being respectful, polite, and considerate towards others is generally viewed as having class. The opposite of this behavior can lead to being perceived as arrogant, rude, and disrespectful by others. It is important to treat others with kindness and respect, regardless of their social status or background.