Somebody who Calls you using *67 because they are immature and want to annoy the living crap out of you. Restricted callers tend to be large groups of annoying girls who are trying to play a prank and end up giggling half way through what they were trying to say. Restricted callers are never funny although they hang up laughing as if they were.
Me: Yeah, uh, I'm HAVE to get part-time job, so from now on I'll have to leave after school every couple days for a few hours.
Advisor-guy: You can't do that.
Me: What? Why can't you guys let me?
Advisor-guy: Because.. uh.. we like to suck dick.