Twittonary
A Single Function SiteDescription:
Twittonary is an easy way to learn about various Twitter related words, which in turn classifies it as a Twitter dictionary. The service includes 2 ways to search for the meaning of a Twitter related word; you can do so by either using the search box, or by viewing all the words that begin with a particular letter.
The service definition of Twitter related words is a collection of submissions by tweeple, meaning you can also contribute by adding a new word. Twittonary can definitely help you learn the terms used on Twitter, and can save some characters when tweeting, and as this is the subject, you can follow the tweets of the service @twittonary.