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1.
The act of posting inanities to twitter, as distinct from posting useful/relevant/valuable information (tweeting).
Man, I signed up to twitter hoping that I'd find some intelligent people tweeting, but all I got was idiots twitting!
by helio88 July 04, 2009
 
2.
The process of posting messages to one's Twitter page.
"I was twitting throughout that whole presentation this morning."
by Ballapeno November 10, 2008