turn someone's stomach
turn your stomachor
make your stomach turn
1. If food or a smell turns your stomach, it makes you feel sick. I can't eat meat, it turns my stomach. The mingling smells of all the food cooking in the kitchen made her stomach turn.
2. If something you have seen or heard about turns your stomach, it makes you feel very shocked because you feel it is morally wrong. The way he treats his staff turns my stomach.