When an object or person causes you dissatisfaction you may fart on it to show it (or them) the measure of your dissatisfaction with it's (or their) manner, way of being, actions or existence.
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!