砂すな下おろし

noun

cleaning dirt or sand out of the digestive system

Refers to the process of removing accumulated sand or dirt from the digestive tract, often in the context of animals or traditional health practices.

• 鳥とりは砂すな下おろしのために小こ石いしを飲のみ込こむ。

  Birds swallow small stones to clean sand out of their digestive system.