What is meant when someone refers to something as gross?

When someone describes something as gross or grossing them out, they typically imply that the thing in question is highly unappetizing or disgusting to them, evoking feelings of revulsion or disgust. "Gross" is a subjective sensation and can vary from person to person. Things considered gross can range from substances that are physically unpleasant, like bodily fluids or rotting food, to behaviors deemed socially or ethically unacceptable.