A donkey, usually depicted in grey and black color. It can be used to denote stubbornness, stupidity, and obstinacy or to identify a jackass or the donkey or mule itself. Not to be confused with the 🐎 Horse emoji.
The donkey emoji can be used to reference a cartoon character from the Shrek or the Winnie the Pooh Series. If used as "Mule" it can also refer to a person smuggling illegal drugs across border lines.
It can also represent the Democratic party in the US if used with blue-colored emojis like 💙 Blue Heart or 🔵 Blue Circle, the same as 🐘 Elephant can represent GOP when used with 🔴 Red Circle or other red-colored emojis.