It is possible that:
* It's a misspelling. There might be a similar-sounding word in a specific language or dialect. Could you please double-check the spelling?
* It's a slang term or regional word. It might be specific to a certain group or location. Could you provide more context about where you heard it?
* It's a made-up word. Perhaps it's a fictional term from a book, movie, or game. If you remember the source, that could help narrow it down.
Please provide more information about the context where you encountered "ouboutou" to help me understand its meaning.