The upside-down face emoji, sometimes known as the upside-down smiley face, has several meanings depending on context or the personality of its user. It can indicate silliness, sarcasm, passive aggression, or frustrated resignation. read more
The upside down face emoji first appeared in October 2015 with the iOS 9.1 update for Apple and in December 2015 with 6.0.1 for Android. Around this time, Twitter also rolled out custom emoji called Twemoji 2.0, which include an upside down face. read more