The donut emoji 🍩 represents a sweet fried dough with icing. It is often used as a symbol for snacking, American culture, or when talking about breakfast and coffee.
Usage example
Having a donut for breakfast ☕🍩
I'm craving something sweet 🍩
🔞 NSFW▼
Sexual innuendo (anatomy)
In digital slang, it can refer to bodily orifices, specifically the anus.