A malicious person can be described as a MEANIE or a CAT. The term 'MEANIE' is a slang term used to describe someone who is unkind, cruel, or spiteful. The term 'CAT' is an acronym for 'constantly attacking people, ' which is another way of saying that the person is always looking for ways to hurt or harm others. Both terms are used to describe someone who is intentionally malicious and has no regard for the feelings of others.