The act of commenting on someone's Facebook status with the sole intent of starting a conversation only to delete all of your comments. It is a form of spam that makes the victim appear to be talking to themselves.
Mike's Status: I hate it when people spabble.
Mike: Good, how are you?
Mike: Oh, she's fine, she got out of the hospital last week.
Mike: That's great news!
Mike: Yeah, I don't know.
Mike: Wait, what happened to all your comments?