The fastest way, like 15 mins is to take the sealed package of frozen meat and put it in a container with hot but not boiling water. The meat will act like an ice cube, cooling down the water and other than the very center of the meat it will be ready to cook right away. This is really only good for ground meats because you can fry, flip, and scrape off the frozen center bit while browning the rest of the meat. Still better than microwave defrosting.