1. Italian:
* Musso can be a surname of Italian origin.
* Musso is a town in the province of Sondrio, Italy.
2. English:
* Musso can be a nickname for someone named "Muscles".
3. Other:
* Musso could be a misspelling of "Musco," which is a type of moss.
Without more context, it's impossible to know the exact meaning of "musso." Please provide more information about where you encountered this word.