A mean person can be described as cruel, spiteful, or malicious. They may also be called a bully, a tyrant, or a sadist. Other synonyms for a mean person include aggressive, antagonistic, and belligerent. Further, a mean person can be described as unkind, rude, or offensive. Some may refer to them as unpleasant, nasty, or ungenerous. A mean person may also be called cynical, pessimistic, or even sarcastic. Regardless of the specific term used, a mean person is someone who lacks empathy, compassion, and consideration for the feelings and well-being of others.