Skull

A whitish-gray, cartoon-styled human skull with large, black eye sockets. Commonly expresses figurative death, e.g., dying from extreme laughter, frustration, or affection.

Popular around Halloween. Not to be confused with ☠️ Skull and Crossbones, though their applications may overlap.

Available as an Apple Animoji.

This emoji predates the inclusion of emojis within Unicode. It was first added to early Japanese emoji keyboards by Softbank in 1999.
Skull was approved as part of Unicode 6.0 in 2010 and added to Emoji 1.0 in 2015.