The sleeping face emoji is a yellow, neutral face with closed eyes, a small, frowning mouth, and raised eyebrows, shown with small, crescent-shaped lines or dots above its eyes as if sleeping.
It is often used to convey a sense of sleepiness, tiredness, or boredom, and it can be used to show that you are feeling exhausted or drowsy. It can also be used to express a sense of inactivity or relaxation, or to show that you are feeling uninterested or disengaged.
Generally used instead of ? Sleepy Face to convey sleep or sleepiness.
Sleeping Face was approved as part of Unicode 6.1 in 2012 and added to Emoji 1.0 in 2015.
U+1F634
? Sleeping face