The act of over-anxiously trying to get to third base with a girl, generally resulting in the abrupt interrupting of coitus.
Man1: How far did you get with Lisa last night?
Man2: Well, I got to second base, but got Thrown out trying to steal third.
Man1: Gotta be more patient next time.
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!