* A misspelling: Perhaps you meant a similar phrase like "chat with you" or "chat soon."
* A slang term: It might be a slang term used in a specific community or region.
* A made-up word: It could be a made-up word or phrase used in a specific context, like a fictional story or online game.
To help me understand, could you provide more context?
For example:
* Where did you hear this phrase? (e.g., a conversation, a book, a website)
* What was the situation? (e.g., were you having a conversation with someone, were you reading a text, etc.)
With more information, I might be able to figure out what "chat hu" means.