The act of twittering. In the process of twittering. Often applied to those who twitter on a constant basis.
OMG. Ever since Brian found out about twitter he's been twitterbating all the time.
Me? I'm just twitterbating right now. What are you up too?
The act of using Twitter excessively - often in a vain attempt to manufacture an alternative reality out of narcissism - to the detriment of one's health and social status.
"Why can't he stop twitterbating? Not even his Mother cares enough about him to read this garbage."