Disgust
A visceral aversive reaction to something perceived as contaminating or unacceptable, with a genuinely bodily signature distinguishing it from Contempt's coolness.
How it shows up
Disgust shows up around spoiled food, bodily fluids, certain smells, and also around acts people judge as morally foul. It brings an urge to pull back, look away, or expel, and many people feel it in the stomach and throat. It seems to have roots in avoiding contamination, though how far that explains moral disgust is still argued over. What sets it apart is its physical, recoiling quality.
How it differs from Contempt
Contempt looks down on someone from a cool distance; disgust recoils from something as if it could contaminate you.
Notice
Notice what you turn away from almost before thinking, and whether that reaction is about the senses or about values.
Where it is felt
Felt most in the stomach, throat and face.
Based on Nummenmaa et al. (2014), bodily maps of emotions, and related research. The map shows where people report bodily sensation, on average; individual experience varies.