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.
Restricted Caller: Yes Hi *giggle* Would you like a *giggle* large pepperoni goat pizza? *giggle giggle*