A person who is neither introverted, nor extroverted, but both at times. An Ultravert can be recognized by his wavering attitudes toward group interaction: at times, the ultravert will be the center of attention, running the show and being the life of the party, and at other times the ultravert will wish to be by himself without interruption to think or brood. This phrase was coined by the user IceWire, from Kongregate in a chat.
John has been sitting by himself all day, but yesterday he was leading the karaoke party awards. What's with that?