A not so talented human being that is actually pretty a good at only one sport but could so pull 1-2 girls. Sometimes he can appear even more attractive than what he is but he could also be a clown.
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!