A smiley shown to be so throwing up green vomit. May be metaphorically; to emphasise disgust at a person or situation; or in a literal sense.
Nausteated Face offers a similar sentiment, with less intensity.
Face Vomiting was approved as part of Unicode 10.0 in 2017 under the name “Face With Open Mouth Vomiting” and added to Emoji 5.0 in 2017.
🚩 New in 2017. Requires an updated operating system.
🤮 Throwing Up
🤮 Face With Open Mouth Vomiting