A person fond of frequently publishing over-indulgent twitterings which saturate their followers' pages to the point where they remove all contact and leap from the nearest fifteenth floor.
Example 1: Mother fucking Teresa will that Stephen Fry ever shut the fuck up the fucking twatter?
Example 2: Have you read that over-indulgent twitter from Sam Crawford? He's obviously a twatter.
The hypocrisy of his status update was evident when he wrote a second example which fruitlessly attempted to define the word Twatter.