Abbreviation for TWEETING (Tweetin'), or TWITTERING (Twitterin'). The act of posting to the popular social networking site, "twitter.com", esp., but may also refer to other popular chat and blog services.
What r u TWTN now?
I've been TWTN nonstp 4 hrs. LOL!
I need 2 start TWTN 4 my party this weekend...