a clown ass nigga who waits hand and foot on females because they have no game. having no game has left them feeling like the only way to get a woman to like them is to light candles and serenade them like with brian mcknight or some shit. they go out every day w/ a "happy to help you with that ma'am" badge on their sleeves (credit victor), ready to inconvenience themselves to any extent for a females attention, and still go home without getting their dick sucked.
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!