A person who has a Twitter account they regularly update and that no one beyond themselves reads. Aware of the lack of traffic, they keep at it, seemingly Twittering only for their own self-gratification or to make themselves feel more important/special.
Guy #1 -- "Hey, guys! You should check out my Twitter page, it's crazy cool!" *walks off*
Twitterbate (verb) - To use Twitter.com in a manner that is fast-paced; constantly clicking, tweeting, adding friends, replying, and so forth. The user tends to have feelings of excitement, anxiety, or tension and usually yearns in real-time for the next action from the tweet community by staring at the auto-refresh of the internet browser.
Twitterbation Twitterbating
The twitter community is buzzing today. Everyone's tweeting with the news. I'm sure I'll twitterbate all morning.