What is hun?

It seems like your query is a bit unclear. The term "hun" could refer to several different things, depending on the context. Here are a few possibilities:

1. Hun (Term of Endearment): "Hun" is often used as a colloquial term of endearment in English-speaking countries, similar to "honey" or "sweetheart."

2. The Huns (Historical): The Huns were a nomadic people who lived in Central Asia, the Caucasus, and Eastern Europe between the 4th and 6th centuries AD. They are historically notorious for their invasions of Europe and are often associated with their leader Attila the Hun.

3. Hun (Slang/Phrase): In certain contexts, particularly during WWI and WWII, "Hun" was used as a derogatory term by the Allies to refer to Germans.

4. Hün (Geographical Locations): There are places with similar names, like the village of Hün in Iran.

If you can provide more context or specify which "hun" you're referring to, I can try to provide more detailed information!