A narcissist is a person who has an excessive interest in or admiration of themselves. This behavior often includes a strong need for attention and validation from others, leading to a lack of empathy for those around them. Narcissism can manifest in various ways, including boasting about achievements or seeking constant praise. In psychology, narcissism is often discussed in relation to the Narcissistic Personality Disorder (NPD), a condition characterized by grandiosity, a sense of entitlement, and a tendency to exploit relationships. While some level of narcissism is normal, extreme cases can negatively impact personal and professional relationships.