At Reply, or “@reply”: A direct tweet sent to another Twitter user.

Hash Tag: The “#” sign. Allows Twitter users to group tweets by topic, making it easier to search particular conversations using Twitter Search.

ReTweet (RT @USERNAME): To repost something that’s already in the Twitter stream.

SnapTweet: A tweet that includes a photo taken with a phone.

Twittcrastination: Procrastination brought on by Twitter use.

Twadd: To add someone.

Twaigslist/Twebay: To sell something.

Tweeter/Twitterer/Twit: Someone who uses Twitter.

TwinkedIn: Inviting friends made on Twitter to connect on LinkedIn.

Twittectomy: To remove someone from the list of people you follow.

Twitterati: The A-list twitterers everyone follows.

Twitterfly: Twitter’s version of a social butterfly, marked by the extreme use of @ signs.

Twadd: http://twitter.com/minttwist