😴 Sleeping Face
A face with closed eyes and small open mouth, there are several Z symbols on his forehead that represent sleep. It is used to show that someone is extremely tired, on the verge of falling asleep or even that something is so boring that it makes one fall asleep. This expression is very intuitive and shows very sleepy, very boring or tired.
Sometimes people use this emoji to pretend they are sleeping and hope others not to bother them.