Twitteronym 

Twitter name.

She has changed her Twitteronym to @hisinorita.

Twitteronym by uttam maharjan October 14, 2012

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

Twitteronia

A country (of the virtual variety). All twitter users are citizens.

@THE_REAL_SHAQ is the King of Twitteronia.

@THE_REAL_SHAQ: "To all twitterers , if u c me n public come say hi, we r not the same we r from twitteronia, we connect"

Twitteronia by THE_REAL_HYFEN February 28, 2009