The term “ narcissism ” is commonly used to describe anyone who is self-absorbed. Someone who exhibits narcissistic traits may have a personality disorder known as narcissistic personality ... Narcissistic personality disorder is a formal mental health diagnosis. It is not a personal choice or type of personality. Learn more about symptoms and causes. Narcissistic personality disorder (NPD) is a complex and heterogeneous personality disorder characterized by patterns of grandiosity, entitlement, low empathy, and interpersonal difficulties, which can manifest as either grandiose (“thick-skinned”) or vulnerable (“thin-skinned”) forms. [1][2] Grandiose individuals display arrogance, social dominance, and exploitative behaviors, while vulnerable individuals show shame, inferiority, hypersensitivity, and extreme reactions to criticism ... NARCISSISM definition: 1. too much interest in and admiration for your own physical appearance and/or your own abilities…. Learn more.