Joe: yo why are you scratching your dick so much?
Bill: I was beatin my meat, then I ran outta lube and wasn't concentrating.
Joe: Did you get mintdick?
Bill: *Nods in shame*
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!