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individuals who constantly write meanignless posts to social network sites like Facebook or Twitter.
That nit-twit is constantly posting his location, not realizing we really don't care.
by Tall New Yorker November 27, 2010
A person who constantly tweets, flooding you with inane details about their daily activities.
John is a total nit-twit, I've gotten 20 tweets from him this morning, the most interesting of which being that his cat loved the new cat food.
by golden wench October 14, 2009
A person who attempts to tweet but is too dumb to use or understand Twitter
John keeps f-ing up his tweets. What a nit twit.
by mmowry April 28, 2008