Disgust is a strong negative feeling of aversion or disapproval. You may have a sickening feeling of revulsion, loathing or nausea. Disgust, as registered by the wrinkled nose, lowered brows, narrowed eyes, a protruded tongue and a open-mouthed look of a baby who has just tasted lemon juice, certainly is universal.

You can tell when people are disgusted by their facial expressions; they raise their cheeks, curl their upper lips, the lip corners are drawn down and back, narrow or partly close their eyes, lower and slightly narrow their eyebrows, lowering the inner corners of the eyebrows, draw up and wrinkle their noses, jerk their heads backwards, shake their heads side-to-side, protrude or move forward their tongues, and make gutteral sounds of "ach" or "ugh".

Sometimes people feel disgust for certain things that others do, or the way they do things. Maybe it's not the actual people themselves, although it is easy to regard someone whose actions are largely revulsive as someone to dislike.