Here are some possibilities:
* "W czacie" means "in the chat" and is the correct way to say it in Polish.
* "W chat**" could be a shortened version of "w czacie," but it's not grammatically correct.
* "W chat" might be a slang term used in online communities, but it's not common or widely recognized.
If you provide more context, I might be able to help you understand what the writer meant.