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1.
A person who has a chronic disorder characterized by dependence on tagging themselves at places using social media, repeated excessive use of Facebook or foursquare etc. to notify other of their current location, the development of withdrawal symptoms on reducing or ceasing posts.
Nathalie is a tagaholic, she will tag herself at every place she goes, even if we don't actually stop there.
by Very Concerned Friends May 31, 2012