* A misspelling: Perhaps you meant "bon vivant," which is a French phrase meaning "good liver" or someone who enjoys the finer things in life, particularly food, wine, and social gatherings.
* A slang term: It could be a regional or niche slang term. If you heard it in a specific context, please provide more details about where you encountered it.
* A foreign word: It might be a word from another language. If you know the language, please specify it.
To help me understand what you meant, please provide more information about the context in which you heard or saw the word "bonvi."