Adding status updates to Facebook, constantly, because no one is paying attention to one. Also, being alone in one's room in a house full of people, feeling lonely, and appealing to Facebook to feel validated.
Person 1: Crapsauce! John has texted me three times, and updated his status six times. He must be lonelybooking again.
Person 2: I'd talk to him, if he didn't lonelybook all the time. It's so annoying.