A group of people who are very lame, led by a person who fancies himself as the leader of the group, and spends a lot of time badgering other people who hang out with or be a part of the EE.
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!