look up any word, like thot:
 
1.
When someone leaves their Facebook logged in and another person comes along and changes their profile picture to a JackFace from the TV series LOST, leaving them in utter humiliation.
Q- "Dude, why did your profile have that weird picture of Jack Shephard from LOST?"
A- "Oh, someone totally Facebook Jacked me."
by Anonymous User 132941 January 29, 2011