* A misspelling of a different word. Could you provide more context?
* A word from another language. Perhaps you've come across it in a foreign language text or film. If you can tell me the language, I might be able to translate it for you.
* A made-up word. Perhaps it's a fictional word from a book, game, or other creative work.
Please provide more information so I can help you understand the meaning of "lupka."