Do you mean "Visual Manouvering (circling)" - VMC (but not abbreviated to VMC because VMC is already in use.
Visual Manouvering (Circling) is where the aircraft makes an approach to one one runway, then at a point when they are visual with the airfield (and a number of other factors), fly round to the runway in use (due to wind or topography).
This is something that happens at airfields where this is instrument approaches to ONLY one runway; Biggin Hill, Cranfield immediately spring to mind.
That the answer to the question?