My being Chinese and having been the target such words, the use of the term in Hammye's particular context caused me to think that it was used with its derogatory meaning. I'll assume that you meant the driver was a "nitwit" or "moron" (which many drivers are, including many Asian ones

).
I can give Hammye the benefit of the doubt that he didn't know of the other meanings. Perhaps we all can. Now we're all a bit more knowledgeable.
Take care, and mind the nitwit drivers out there.