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
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