Top definition
A person who uses Facebook to get their ego stroked and is so enamored by it that an addiction develops out of a need for constant validation.

Note: A sympathy seeker also falls under this category.
All Amy had to do was write, 'Thanks to all for the birthday wishes!' on her Facebook Wall but because of her validation addiction, she instead chose to personally thank each and every one of her 500 friends!
by Poop Stain Barney April 22, 2011
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