watery diarrhea; very watery diarrhea
Refers to diarrhea that is extremely watery, often used in medical or everyday contexts to describe severe loose stools.
If you have persistent watery diarrhea, you should go to the hospital.
I got watery diarrhea from food poisoning.
Compound of 水 (water) and 下痢 (diarrhea). The exact historical derivation is uncertain, but the meaning is transparent from its components.