The extreme & bizarre sexual act, where your girlfriend takes a good mouthful, and implodes, spraying semen-like dandruff everywhere. She then pulls on her nipples, and ties a noose and your neck with them, virtually hanging you. She them pulls her legs around your neck, reviving you. She then wrenches her thighs back, exploding pubic hair up your nostril. She then leans back and ends the whole thing off by making a limmerick about Amanda Vanstone and a giant lemon. If you haven't reached some form of orgasm by now, you're impotent.
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!