A cultist is a person who belongs to or follows a particular religious, social, or political group that is considered extreme or unusual. Cultists often have strong beliefs and are dedicated to their cause, sometimes to the point of being fanatical or obsessive in their behavior. The term can also refer to someone who practices cult activities such as human sacrifice, ritualistic abuse, or other forms of manipulation or control over others. In short, a cultist is someone who follows and participates in an extreme or unusual group or activity.