Is a person of low intellect, often a Fairweather rugby fan. Mainly subsists on a diet of Murphy's stout a sort of poor man's Guinness and turnips. It can be found at rugby grounds but only if his team is guaranteed to win and the weather is good.
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!