Knobcunt, a person who is a bit of a div and disrespectful in general. Usually the person in the club that is a complete liability that everyone tries to avoid!
Don't invite him to the party, the guy is a proper knobcunt!
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!