GPS (Global Positioning Steven)

Named for an annoying wannabe kid who never gets invited to go places, but always seems to show up anyway. Because he can find his "friends" anywhere, even if they go to great lengths to exclude him or go places that they think he'll never find them, he is thought to have an extrasensory advantage in locating others.

"So I went to the mall with Joe the other day and Nick showed up. It was like he was waiting for us!"
"Yeah, he does that all the time. He's got GPS."