washing rice, vegetables, dishes and used water.

swill, hogwash in English, also known as swill or spoiled water, refers to the leftover food that restaurants and families pour together (for example, in barrels) after eating. Urban swill refers to the leftovers abandoned by people in restaurants, restaurants, schools, canteens and other places, including the leftovers such as vegetables and fish discarded before cooking and the mixture of leftovers abandoned by people at home and water. It is best not to throw swill, otherwise it will do great harm to the environment.