To have a random comment(s) left on your Facebook profile in the night by a drunken friend(s).
Look at my Facebook page, I've been Onioned!
The act of mistaking an article written by the satirical newspaper "The Onion" for a genuine article. Usually demonstrating a persons lack of critical thinking skills.
Chinese government run newspaper was onioned in 2002, when they reported that "Congress Threatens To Leave D.C. Unless New Capitol Is Built".