It could be used in a few ways:
* As a playful or sarcastic greeting: Someone might say "Bonjour-no" to jokingly express that they are not happy to see someone.
* As a refusal in French: Someone could say "Bonjour-no" to refuse something, similar to saying "no" in English. This would be grammatically incorrect but could be understood in certain contexts.
Important: "Bonjour-no" is not a commonly used or understood phrase in French. If you're trying to communicate in French, it's best to stick to standard phrases like "bonjour" or "non."