When someone leaves their Facebook account logged in or shares their login details with someone else at which point someone makes posts to said person's account without their knowledge.
"Bill just got facejacked. That guy gave me his login credentials for Facebook so I wrote on his wall and updated his status."
by Agent SILVERFOX February 13, 2009

When a "friend" posts something on your facebook wall that is publicly visible and is a blatant negative to you and your friends.
by The Plan Man -B 2 the Thornton September 15, 2009

v. To go on another person's social networking profile that has been left on the computer because the victim is away.
by UrbanLynx March 18, 2010

by Dr.Wurd November 02, 2010

to post your own self-promoting information on a FaceBook page under the guise of being a friend or fan.
by Joe's Black T-Shirt May 04, 2010

The act of breaking into someone's Facebook account and editing the profile to involve potentially embarrassing or humiliating information.
by rock.star April 29, 2007

by jackoffasaurous Rex June 25, 2010
