went badUsed for food or other perishable things meaning “spoiled,” for machines meaning “broke down,” and for a person meaning “went bad” or “became corrupted.” The phrase can appear in other forms, such as se echa a perder and se eche a perder.
SP: La leche se echó a perder porque la dejamos fuera del refrigerador.
EN: The milk went bad because we left it out of the refrigerator.