Use when physical sensations in your stomach, like nausea, make you feel unwell.

Physical Origin

Can express mild discomfort or severe nausea; context or tone will clarify.

Intensity Varied

Doesn't necessarily mean you're sick; could be a reaction to a situation or action.

Use it to describe a strong negative emotional reaction, not just feeling sad or upset.

Treat it as a metaphor for being deeply disturbed by something unpleasant or shocking.

Even though it mentions 'sick', it might not relate to actual sickness but a sense of moral disgust.