The Neutral Face Emoji 😐 which was approved as part of the Unicode 6.0 back in 2010 and has been included in Emoji 1.0 in 2015, is a yellow face emoji that has an open eyes and a flat, closed mouth.
It is like it is not offering any type of feeling, but it often shows a slight irritation. So, if you are irritated with someone, you can use this emoji in your chat or text message.
Additionally, you can use the Neutral Face emoji to express “I don’t know what else to say” 😐.