noun. A quality possessed by all buttfaces--and a few assfaces too.
Real citation: "@algonquinrt 'buttfacedness' yes, 'buttfaceness' no. BTW I pronounce it 'buttface-edness' JS"
(Aug. 11, 2009, Miss Kitty, Twitter, http://twitter.com/booboo_kitty33/statuses/3251142424)
Made-up citation: "If you think buttface-edness is horrible, what would you say about facebutt-edness? It might be a good month to stay away from the latest medical journals."