frequent and watery bowel movements; can be a symptom of infection or food poisoning or colitis or a gastrointestinal tumor
"After eating that suspicious street food, I spent the next twelve hours battling severe diarrhea."
A gastrointestinal disorder characterized by frequent and very fluid or watery bowel movements.
"After eating spoiled seafood, he spent the rest of the afternoon rushing to the bathroom due to severe diarrhea from the contaminated shellfish."