When someone new breaks his way into a new group of friends due to change of circumstance. This can often cause confusion in the group with a change in the ranking of the alpha males or smaller characters in the group becoming left out and replaced.
Ben: I think Fister is coming over saturday night as well.
Karl: Fister?
Ben: you know Alex.
Karl: That bloody ringbreaker! who does he think he is! breaking into the gang and acting as if nothing has happened!!
Ben: Shut up karl.
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!