Inflated sense of self-importance

Narcissistic Personality Disorder

Narcissistic Personality Disorder is characterized by a long-standing pattern of grandiosity (either in fantasy or actual behavior), an overwhelming need for admiration, and usually a complete lack of empathy toward others. People with this disorder often believe they are of primary importance in everybody's life or to anyone they meet. While this pattern of behavior may be appropriate for a king in 16th Century England, it is generally considered inappropriate for most ordinary people today.
People with narcissistic personality disorder often display snobbish, disdainful, or patronizing attitudes. For example, an individual with this disorder may complain about a clumsy waiter's "rudeness" or "stupidity" or conclude a medical evaluation with a condescending evaluation of the physician.
In laypeople terms, someone with this disorder may be described simply as a "narcissist" or as someone with "narcissism." Both of these terms generally refer to someone with narcissistic personality disorder.

Symptoms of Narcissistic Personality Disorder

In order for a person to be diagnosed with narcissistic personality disorder (NPD) they must meet five or more of the following symptoms:

• Has a grandiose sense of self-importance (e.g., exaggerates achievements and talents, expects to be recognized as superior without commensurate achievements)
• Is preoccupied with fantasies of unlimited success, power, brilliance, beauty, or ideal love
• Believes that he or she is "special" and unique and can only be understood by, or should associate with, other special or high-status people (or institutions)
• Requires excessive admiration
• Has a very strong sense of entitlement, e.g., unreasonable expectations of especially favorable treatment or automatic compliance with his or her expectations
• Is exploitative of others, e.g., takes advantage of others to achieve his or her own ends
• Lacks empathy, e.g., is unwilling to recognize or identify with the feelings and needs of others
• Is often envious of others or believes that others are envious of him or her
• Regularly shows arrogant, haughty behaviors or attitudes

http://psychcentral.com/disorders/sx36.htm