a person on Facebook who over posts and/or changes status updates on a continuous basis causing your news feed to be inundated with their posts
Penelope was the quintessential Facebookundator, she posted songs and pics once every 5 minutes all day every day.
by Penelope Storm July 19, 2011
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One who inundates Facebook with endless posts, videos, photos or links
Cara was known as the ultimate Facebookundator posting nonstop all day, errrrry day.
by Carabear717 May 27, 2011
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