Meaning
A face tinted green with puffed cheeks and a queasy expression, as if it is about to be sick.
It covers real nausea from motion sickness or bad food, and also strong disgust at gross photos, cringe posts or a food combo you find awful. It is one step below 🤮, which shows the actual vomiting. Example: “Pineapple and mayo on the same pizza? 🤢”.