* A nickname or shortened form of a name: like "Chet" for "Chester" or "Chevrolet."
* A slang term: depending on the context, "Chet" might be a slang word for something, but without more information it's impossible to say.
* A word in a specific language: If you heard it in a particular language, it might have a specific meaning.
To understand what "chet" means, you need to provide more context. For example, tell me:
* Where did you hear it? (e.g., in a conversation, a song, a book)
* What was the situation? (e.g., who said it, what were they talking about)
With more context, I can help you figure out what "chet" means.