Special Snowflake Syndrome
A malady affecting a significant portion of the world's population wherein the afflicted will demand special treatment, conduct themselves with a ludicrous, unfounded sense of entitlement, and generally make the lives of everyone around them that much more miserable.

The danger of this disease is that the sufferers rarely, if ever, know that they have contracted it, and continue about their merry way under the assumption that EVERYONE ELSE is the problem.

This condition, if left untreated, can radically alter the carrier's demeanor, to include any of the following: a complete devolution to child-like behavior, temper tantrums, and/or fits of narcissistic rage.

When confronted with an individual suspected of harboring Special Snowflake Syndrome, one's best course of action is to run away. Further attempts at educating the carrier on the reality of their condition (e.g., quoting Tyler Durden: "You are not special. You are not a beautiful or unique snowflake. You're the same decaying organic matter as everything else.") will likely prove futile, and potentially hazardous to the informer.
-Can you believe that lady who was just in? Where the hell am I supposed to find the earrings that match this necklace that the manufacturer stopped making ten years ago?

-Hell if I know, but she definitely had Special Snowflake Syndrome.