twittovert 

One who feels an increased sense of bravery over tweeting on Twitter, as opposed to in person.

In a DM in Twitter
He : I don't know if I can really talk with you in real life
She: Damn. You are so comfortable tweeting stuff and replying in the threads. You are such a twittovert. Damn...

twittovert by paradoxicalGru April 19, 2018

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

TwitterTwat 

A complete twat , who believes he is adding value to the world by tweeting incessantly about his/her mundane life!

Part of the "Get a Life you Twat" Inititiative

"I had Kelloggs for breakfast ..." What a TwitterTwat!
"My poo is green...." What a TwitterTwat!

TwitterTwat by TwatMD June 22, 2010

twitrovert

someone who feels an increased sense of bravery when Twittering, as opposed to in person.

She is so quiet in real life, but when she gets on Twitter, she lets her hair down and becomes quite the Twitrovert.

twitrovert by karpo4 March 27, 2009

Twittourettes 

Early Stage Twittourettes:

Early Stage Twittourettes is a condition specific to Twitter users who sit back and watch what other people are tweeting, while not actively tweeting themselves. The Twitter user with Twittourettes will often send seemingly witty, yet random replies to a Tweet that he/she feels will result in, at the least, a short conversation. The Twitter user with Twittourettes will sit and wait for a reply, but 99.9% of the time will be ignored. See Example 1

Advanced Stage Tourettes:

In Advanced Stage Twittourettes, the Twitter user will Tweet random thoughts which are geared towards drawing attention to themselves. The Twitter user with Twittourettes will sit and wait for a reply, but 99.9% of the time will be ignored. See Example 2

Example 1
Early Stage Twittourettes:

NormalUser1: Does anyone know if the Celebrity Standup special on TV is part of the Tour?

RandomUser2: @NormalUser1 Google is your friend

NormalUser1: Everyone says it is, so I won't watch it cuz I'm going to see him on tour.

RandomUser2: @NormalUser1 You're not missing anything, the TV special is censored

NormalUser1: So, is anyone else going to see the Celebrity Standup special on tour?

Example 2
Advanced Stage Twittourettes:

RandomGuy1: I tried vegetarianism, but I realized that all those cute animals are so delicious.

Twittourettes by Greywulf2112 May 17, 2009

Twittversation 

When people have a conversation via twitter.

Paul: Hello world.
Brian: @Paul Hey, what you doing?
Paul: @Brian Nothing much just woke up.
Brian: @Paul Oh, cool. wanna hang out?
Paul: @Brian Sure let's go hit the gym.
Jessica: @Paul, @Brian Can you guys stop your Twittversation please?

Twittversation by ItweetYFC123 August 2, 2010

Twittertition 

A competition run through Twitter.

I just won a free pizza through a twittertition!

Twittertition by mattywillie October 25, 2010