Will chicken stir fry go bad unrefrigerated?

Yes, chicken stir fry can go bad if left unrefrigerated. Generally, perishable foods like cooked chicken should not be left out at room temperature for more than two hours, as bacteria can multiply rapidly in that time. If the temperature is above 90°F (32°C), the safe window reduces to just one hour. It's best to refrigerate leftovers promptly to ensure safety.