No, there is no reason that you could safely leave a steak out overnight. Go ahead and throw it away it is not good or safe to eat. Bacteria can grow rapidly in the "Danger Zone" which is the temperature range between 40 °F and 140 °F. This means that it is important to take steps to keep food cold or hot so that it does not enter this range. If you have meat or poultry that has been left out overnight, discard it immediately.