The phrase "tummy bug" refers to an illness that affects your stomach, causing symptoms like vomiting, diarrhea, and stomach pain. It is also known as a stomach bug or stomach flu. Full definition
Stock is my secret weapon to keep my family free of tummy bugs that are running rampant through school and the community at large during the winter months. (thehealthyhomeeconomist.com)
I used to ponder this very question as to why I kept catching so many tummy bugs despite eating everything organic. (thehealthyhomeeconomist.com)