User blog comment:TheMG/Might be less active/@comment-4677076-20120709183735/@comment-6008104-20120709184354

It stands for Cameos and Crossovers. It was an Request for Comment (discussion about policy and stuff). Wikitroid:Requests for Comment/Archive 1

It is where it all started. All the drama on Wikitroid started THERE (actually, it started in the discussions that led to an RfC being created in the first place, but close enough).