the o.g. owner of seaville, new jersey's 'sea grove' campground. most usually spotted on a green golf cart, bottle in hand, hiding his cigarettes like a bitch.
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!