Used on online forums, refers to when a person gets upset at something and goes through and edits their posts, removing everything they're saying and replacing it with a period, leaving shells of the conversation for people to guess at. Sometimes is done when the person is publicly humiliated, but more often is done when a person simply wants to erase their existance from the forum and have nothing to do with it any longer.
Named after a person who did it and removed over 1000 posts in a single thread.
After he got embarassed from his history being dug up on the internet, he decided to roiderize all his posts, removing all traces of everything he said. All that remains now are a couple posts from him that were quoted in other people's posts.