Egomania is a term used to describe an excessive sense of self-importance and entitlement. It is often associated with extreme narcissism and can be seen as a symptom of mental illness. Extreme entitlement is a related concept, referring to an individual's belief that they are entitled to special treatment or privileges that are not available to others. This type of behavior is often seen in people who have a strong sense of superiority and entitlement, and it can lead to negative consequences for both the individual and those around them.