narcissist

Example:His narcissistic behavior was infuriating to those around him.

Definition:Having or showing a high level of self-regard and a tendency to be self-absorbed and to seek admiration.

Example:Diagnosing her with narcissistic personality disorder helped her better understand her actions and motivations.

Definition:A mental condition characterized by an inflated sense of self-importance, a deep need for admiration, and a lack of empathy for others. It often leads to self-centered, manipulative, and exploitative behavior.

Example:She approached every encounter narcissistically, demanding constant attention and validation.

Definition:In a way that is highly self-regarding or self-centered to the point of being unreasonable or even neurotic.