A mental disease that causes people born between 1981 and 2001 to believe that they are the smartest, coolest, and most entitled group of people that have ever lived. The disease is usually cured by inevitable doses of reality and eventual maturity.

Let me die.

The belief of sales, marketing, and advertising professionals that the Millennial demographic represents a completely unique group of consumers and as such, entirely new approaches must be adopted. Even if the product you are trying to sell is intended for a completely different demographic, such as Depends Adult diapers.