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2.
the act of sending pictures of your naked body via facebook message.
Boy: I'm hornyy... I want to see your ass ;)
Girl: Wanna facebone?
Boy: I'll log on now.
by zebrapanties April 08, 2011
 
1.
Facebones is the loveable skull that is seen often in the TV show Metalocalypse. The band Dethklok sometimes uses him as a video tour guide for people touring their home at Mordhaus. He has also been known to introduce their performances.
Facebones says, our snipers are armed with 50 caliber sniper rifles and will shoot you on sight if you leave the tour group.
by Jeebus Almighty February 12, 2008