When someone new breaks his way into a new group of friends due to change of circumstance. This can often causeconfusion 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 saturdaynight as well.
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.