Top Definition
When someone uses Twitter to promote his facebook group.
The Twitter's Facebook group (now deleted) is the best example of what a Twitbook is.
by freakishlyyours March 02, 2010
1 more definition
combination of TWITTER and FACEBOOK.
Twitter+Facebook=TWITBOOK
and for those who has twitter and facebook.
i love twitbook!
by akome October 18, 2009

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