1. Someone that takes over a Blab.im group video chat, or other social network conversation, without any regard of the topic already being discussed.
“Paul entered the crowded Blab room with a mission. As soon as he was accepted on video, he immediately spouted his concerns about his festering toe fungus…and cries of “blabjacker” began to fill the comment sidebar. By the time Paul was finished speaking with his clear restless lip syndrome, the Blab room was empty.”