Twitter tag 

see hashtag. A "#" symbol used on Twitter to denote its subject material.

Facebook post: "Tix to see Kanye for 40 bux #winning"
Comment: "Stop using Twitter tags on FB, you little fuck."

Twitter tag by Col. Hans Landa October 3, 2011

Twitterfag 

A person who constantly posts on twitter about things that no one else cares about or things that are irrelevant.

Over the past 5 minutes you have had 3 posts about your dog, 2 about your best friend, and 1 about your grades, your're such a Twitterfag.

Twitterfag by dj4800 December 18, 2011

Twittertalia 

The members of the Hetalia fandom that have made twitter accounts to roleplay as certain characters. It's mostly crack roleplay but you do get the rare serious roleplayer as well.

The #worldtweeting on twittertalia accomplished nothing.

Those twittertalia roleplayers are weird

Twittertalia by a twittertalia person August 21, 2013

Twitterage 

Mass anger and hysteria that follows any failure on the part of Twitter. Also associated with disproportionate public expression of any online behavior.

When Twitter went down because some hackers compromised its DNS records, thousands of its members had a twitterage.

Twitterage by Mohit Hira December 18, 2009

Twitterfaghag 

A woman who lives and breathes to read the tweets of a twitterfag

Jessie gets the tweets of her favorite twitterfag sent to her cell phone...what a twitterfaghag!

Twitterfaghag by twitterpated27 April 8, 2009

Twittertainment 

First coined by Twitter user @H0llywoodWh0re to describe entertainment though the public content on Twitter.

Health care plan? How about free health care on Twitter for the fuckwits.. until I guess Tweepies will have quality 'Twittertainment'.

He's my Twittertainment since he decided moronic fuckwit was his new day job.

Quality Twittertainment, I love how the current events tend to arrive earlier though Twitter.

@H0llywoodWh0re, follow her because she's open, opinionated, and she's a 'Twittertainment' Twitter addict.

Twittertainment by H0llywoodWh0re July 26, 2009

twittertariat 

Those ranks of users whose comments go largely unnoticed by the world outside twitter. Below the twitterati but, of course, above the lumpentwittertariat.

No one reads my tweets - I'm a card-carrying member of the twittertariat.

twittertariat by Clifford Morell December 7, 2009