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2.
Someone whose gains an above-average level of pleasure from posting something on Facebook or liking every status they come across.
Ned: "Kelly's such a facebookstitute, man. I caught her liking all of my comments."
Bob: "Wow, bro."
by The Bacon May 14, 2013
 
1.
One who prostitutes themselves on facebook by adding strangers to increase their friend total.
I signed into facebook this morning and I had 12 friends requests from facebookstitutes. I have no idea who they are, but they must be desperate for friends.
by Susie Stewardess May 14, 2009