gastroenteritis
stomach flu
intestinal flu

Stomach flu usually goes away without medical treatment in 1 to 2 days.

Try not to be around others who have stomach flu.

Sometimes, the stomach flu can last for a week or two.

Both, now 17, have come down with stomach flu here.

It was his first action since missing two games with the stomach flu.

"You think maybe I picked up the stomach flu or something?"

I don't even remember him having had a serious virus or stomach flu.

Then one after another, everybody got this violent stomach flu.

Miller had the stomach flu and spent Monday in the hospital.

"Stomach flu" is a popular term but not a true medical diagnosis.