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A recurring or duplicate post/link on an internet forum.

Started from people posting about a Tweel (tyre and wheel) as new even though it had been around for a while.
That's a tweel - {link to prevois post}
by Giveway January 26, 2012
An abnormally large Dick
Dude! Did you see the Tweel on that Mofo?
by Sucram200 March 07, 2011