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

Twitterosaurs

The insatiable beast that's devouring the lives of millions of people on planet Earth.

Anthropologists all over the world have expressed their concern about the Twitterosaurs. It's still uncertain if it can be stopped.

Twitterosaurs by Coco Nut January 12, 2010

twitterstalk 

To collect information, passively or actively, on an individual using Twitter with the intent of using said information to meet (passively or actively) said individual in real life (IRL).

Her avatar is HOT, I'm going to twitterstalk her.

twitterstalk by slonkak2 January 28, 2009

Twitterponies

A public community of My Little Pony: Friendship is Magic roleplayers who utilize Twitter to present their original (or not-so-original) characters to other players and write scenes that incorporate their characters. Most players tend to write material canon to the television show. The community has a wiki page stating rules and guidelines initially written when the group was formed in February of 2011, but compliance to these guidelines has generally decreased as the community has become more popular. So far over 10,000 Twitterponies oriented accounts have been created. The designation for these accounts on Twitter is "@mlp_(insert name)".

"Have you done your math homework yet?"
"Nope, I've been updating my Twitterponies account all morning!"

Twitterponies by Lightning Twister July 28, 2013

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

Twitternoyance 

Someone whose online personality is extremely irritating.

Richard: Why does Jay retweet everything you post with LOL after it?

Laurie: I don't know? He's such a twitternoyance!

Twitternoyance by bjr808 January 28, 2010

twittersingle 

Adj: a status of a person who is in a relationship or married but does not behave as such on Twitter.

His wife sent about 20 angry tweets to me. I replied, "it ain't my fault your husband's acting twittersingle. You're barking up the wrong tree. Yell at him."

twittersingle by CJFierce September 4, 2013