* A misspelling: Perhaps you meant a different word, like "woozy" (feeling dizzy or faint) or "woo-hoo" (an exclamation of joy).
* A slang term: It could be a slang term used in a specific region or community.
* A word from another language: "Woosa" might be a word from another language. If you can provide more context, such as the language it comes from or where you heard it, I might be able to help further.
Please provide more information about where you encountered this word so I can help you understand its meaning.