Derf: "Hello Mitch, this is Derf. Have you seen my favorite indian princess today?"
Mitch: " Yeah man.... What were we talking about? Oh yeah Sackajaweeah just stopped by. Come by in 20 minutes."
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!