At the point where it passed from the hands of the Saxon peasant to become an item for the table of the Norman overlords.

On that principle, I'd expect when (it was/they were) made into the cut that was to be cooked. I suppose the cooks and servants in the Hall would be using the jargon of their masters when dealing with an item for "the boss".

My guess. YMMV.

Dave Oesterreich