A semi-derogatory term for a person who disapproves of and/or dislikes the website known as facebook. Usually uses the term's fagbook, facegay and fagbooker when describing the website and its users.
Facehaters range from highly intelligent individuals whom disapprove of the zombie-like effects of facebook, to stupid lowlife scene kids who are butthurt about all their potential myspace "friends" abandoning myspace.
Person one: Jeff threw a bitch fit when he saw me on facebook yesturday.
Person two: Well you know its cuz he's been hanging out with those other facehaters.