verb. A combination of friendster and facebook. Means to add someone to your friends on friendster or facebook that you haven't been in touch with for so long that you wonder if you are really still friends.
A friend who is outside the center of your socialcircle but is still just as important to you
Robin considered Gregory a peripheral friend. Although she didn't socialize with him, she had a connection to him that was as strong as her connection to any of her closest friends.