A Grotesquely Unsuccessful Right-wing wanker. We've all met him, trills on Twitter, bsessed with pedophiles, Trump (strange that) and erectile dysfunction meds (though heaven knows why, it's not liking he's getting any). Doesn't respond well to being laughed at ... giggles.
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!