If you're thinking of a specific context, please provide more information. For example, did you see it in a book, movie, or game?
Here are some possibilities:
* A misspelling: Perhaps you meant "Oompa Loompas," the fictional workers from the book and movie "Charlie and the Chocolate Factory."
* A fictional creature: It might be a character from a specific story, comic book, or game that you're unfamiliar with.
* A wordplay: It could be a play on words combining "Umpa" (like the Oompa Loompas) and "Lupus" (a type of wolf).
Let me know if you have more context, and I might be able to figure out what you're looking for!