What does ah chee wah mean in the Mexican?

I'm sorry, but "ah chee wah" does not have a specific meaning in the Mexican language. It is possible that you may be referring to a phrase in a specific Mexican dialect or slang, but without more context or information, it is difficult to provide a definitive answer. If you can provide more details or specify the language or dialect you are referring to, I would be happy to help clarify further.