Noun- An absolute fucking waste of space. The deepest cut words can muster.
Noun - A person who should never have been born and will continue to (unintentionally) reinforce this upon everyone they interact with. Turns precious Oxygen gas used by humans into poisonous carbon dioxide.
Contributes nothing to society except embarrassment.
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!