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1. A person who is unable or unwilling to be shown how to tweet on Twitter. Most often a technologically challenged individual, usually associated with advanced age.

2. The complete fear of Twitter or anything associated with it.
Teen: My dad is such a tweetaphobic! He doesn't even have a cell phone!!!! HE IS SO 50's!!!!!
by Tweetalicious x99 April 26, 2009
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