Narcissistic personality disorder is defined as a mental health condition characterized by an inflated sense of self-importance, a deep need for admiration, and a lack of empathy for others. While this disorder is often mentioned in the context of romantic relationships, the truth is you can run into a narcissist in just about any area of life. They can show up as family members, significant others, or even your boss at your 9–to–5. Because their manipulation tactics are often subtle and ...