Expresses shock, surprise, or a sudden perception. Typical gesture, which shows that the other person is not telling the truth. Thinks he's being lied to.
The face with hand over mouth emoji was introduced in 2017 and released as part of the Unicode 11.0 standard. This emoji can be found under the smileys and emotions
category. Because the face with hand over mouth emoji has been around for quite some time, it should display correctly in the majority of operating systems.