Rib roast, also called prime rib, is a large bone-in or boneless roast cut from the beef rib primal, prized for its marbling and tenderness. 'Prime' here names the rib primal cut, not the USDA Prime grade; a rib roast can be cut from any USDA grade, and using actual Prime-grade beef is a separate, higher-cost choice. It's typically roasted whole with minimal seasoning, salt, pepper, and herbs, so the meat's own flavor carries the dish, and is a classic centerpiece for holiday and special-occasion meals in the US and UK. It pairs well with roasted potatoes, horseradish cream, and red wine sauces.