1. Tweet- A twitter message
2. Twoosh- a tweet that is exactly 140 characters
3. Twude- A guy on twitter. Twitter Dude.
4. Twerd- A word used mainly on twitter. Anything in this list.
5. Twat- Same in real world as on twitter.
6. Twarf- A single word tweet
7. Twerk- A jerk or asshole on twitter.
8. Tweetup- Meeting up offline with people from twitter.
9. Twup- Picking up someone via twitter. Also considered a Twup if done at a Tweetup.
10. Twugs- Various meaning depending on tweet. Either a thug on twitter, or reference to drug use on twitter.