The Brief: The expressionless face emoji is used to express emotions of annoyance or disappointment.

DEEP DIVE
This emoji is mostly used for signaling that someone may feel annoyed or frustrated over someone else’s actions. A word that could replace the use of this emoji could be a sarcastic “great” or “w0w.” Other interpretations include neutral emotions or a sigh of relief.
These episodes are not long enough. By the time you really somewhere, itβs over π #InsecureHBO pic.twitter.com/igIGcnT0aV
— aaamber π (@Amber_Runs_That) May 25, 2020
I tried drawing my roblox avatar in my watercolor style, but it turns out looking messyππ#robloxart pic.twitter.com/sHzLr7LNz3
— IαͺK.α©αT ~(comms closed)~ (@lynn_idk) May 24, 2020