Grimacing Face: Also Known As, Awkward, Eek, Foot In Mouth, Nervous, Snapchat Mutual #1 Best Friend.
A face with open eyes and showing bared teeth.
Grimacing: twisted expression facial in a way that shows wry amusement, pain or disgust.
Used On Snapchat, means that The person you send snaps to most is also who this person sends snaps to most.
Usually used to express misunderstanding or if something went wrong.
* Approved as part of Unicode 6.1 in 2012.
* Added to Emoji 1.0 in 2015.