Disgusted smiley, which is already green with sickness and nausea. Might mean disgust, reluctance, or aversion, or stand for sickness.
The nauseated face emoji was introduced in 2016 and released as part of the Unicode 11.0 standard. This emoji can be found under the smileys and emotions
category. Because the nauseated face emoji has been around for quite some time, it should display correctly in the majority of operating systems.