When a good looking person with everything going for them has the worst attitude imaginable for no good reason. The opposite of a princess. RBF notwithstanding.
That pretty girl stank energy had her complaining about the line, the food, how loud we chewed, and the mascot at the game.
A hardo is a person who tries extremely hard at everything. Most times a hardo will try very hard at things that do not require excessive effort. For example, sports practices, gym class, etc.
Wow did you see Jack at practice today? What a hardo!