Definition of "twitterer" [twitterer]

• One who, or that which, twitters. (noun)
• A user of the website Twitter. (noun)

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• "Glad to see that, of incumbent MEPs, the top twitterer is my friend Sophie in 't Veld (of the Dutch liberals, D'66), and the top Brit is another friend, Graham Watson."
• "Now, I just need to convince Michael that he should be a "twitterer" and "tweet" … he finds it all quite undignified."
• "Rep. Paul Ryan, R-Wis., is an avid "twitterer," posting 48 comments in his first two months on the site."