twitcasting 

Using twitter to comment on, or summarize an event, while it is ongoing. By restating what a speaker has said, posting quotes, or adding original reflections, the 'twitcaster' plays a similar role to a sports commentator.

Twitcasting provides an opportunity for attendants of an event to communicate with each other and share reactions about a speaker, while the presentation is ongoing.

The speaker encouraged 'twitcasting' by providing the hastag of the conference before getting started.

twitcasting by vllhmn July 25, 2011

Twitcrastinate 

the act of mindfully wasting time while on Twitter.

I have so much work to do but instead I'm going to Twitcrastinate for a few more hours.

Twitcrastinate by Sleeping with Ward Cleaver April 21, 2009

twitcrastinate 

Neglecting one's life by wasting time on Twitter.

I have so much work to do but instead I'm going to twitcrastinate for a few more hours.

twitcrastinate by Sleeping with Ward Cleaver April 21, 2009

tweetcasting 

Live tweeting an event on the social networking site twitter. This usually involves tweeting with a hashtag for the event. Others search for the hashtag and then see all of the tweets with that hashtag.

During the South by Southwest conference Jill was tweetcasting the event by tagging all of her tweets related to the event with #SXSW

tweetcasting by MJ Christenson October 31, 2013

twitcrastinating

Rather than doing anything useful in the world, you spend hours on end reading comments, following RTs, and picking up new followers by pursuing other twitterer's followers on Twitter.

Yeah I'm facing a huge writing deadline, but I'm caught up twitcrastinating instead.

twitcrastinating by Sleeping with Ward Cleaver April 21, 2009