a man whose neck-mass dwarfs his brain-mass, generally resulting in profound language skills such as repeated use of the phrases "whateva man" and "lissen you when im talkin"
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!