1. a person who is extremely self-centered and believes in the superiority of their own interests above all others
Usage: rare

Examples

• The superegoist refused to consider anyone else’s needs in the decision.
• His reputation as a superegoist made it difficult for him to maintain friendships.
• The novel’s protagonist was portrayed as a superegoist who valued only personal gain.
• She accused him of being a superegoist after he ignored the team’s input.
• The superegoist’s behavior alienated colleagues and family members alike.