twitterlove 

Showing praise or thanks through name reference, and direct messages toward a person or place on sites like twitter.

Even all these weeks later, there's still a lot of twitterlove for MJ. He's still a trending topic.

twitterlove by bigTlittleODD July 28, 2009

Twitterbomb

To pollute the stream of a Twitter hashtag by tweeting a meaningless, satirical, or spamlike tweet containing the hashtag. Usage is comparable to googlebomb.

McDonald's marketers were horrified as #mcdstories, meant to solicit positive tweets about experiences at the restaurant chain, was twitterbombed with replies like "I ate a Big Mac and got the shits for 24hrs. #mcdstories"

Twitterbomb by bselig November 7, 2012

Twittersphere

The total universe of Twitter users and their habits. Also called the "Twitosphere," statistics for the Twittersphere include data such as which days of the week have the heaviest Twitter traffic, and the approximate number of followers Twitter users have.

The Twittersphere is abuzz with news of Michael Jackson's death

Twittersphere by GriffinR November 22, 2010

twitterdom 

A particular domain or field of twitter communication.

In the twitterdom of gossip, Ann and Katie are queens

twitterdom by JosephOduroFrimpong April 22, 2009

Twitterspeak 

The language of Twitter. Comprised mostly of "@username", "DM" and "RT", it the art of combining these codes to form comprehensible statements in 140 characters or less.

I do not Tweet yet because I am learning Twitterspeak.

Twitterspeak by lamps33 October 14, 2009

Twittersona 

A twitterer's persona.

i.e. Twitter + Persona

There are those who would use their twittersona for evil.

Twittersona by Shannon McDonnell February 12, 2009

Twitterdom 

The kingdom of Twitter. All the twitter applications, the twitter network, and the twitter people (tweeple) are a part of Twitterdom.

There is much to survey and learn about in Twitterdom.

Twitterdom by bgamall June 9, 2009