What is one word that Blanche called Stanley that he doesn't like in scene 7-8?

Blanche called Stanley a Polack.

I take hot baths for my nerves. Hydro-therapy, they call it. You healthy Polack, without a nerve in your body, of course you don't know what anxiety feels like!

STANLEY:
I am not a Polack. People from Poland are Poles, not Polacks. But what I am is a one hundred percent American, born and raised in the greatest country on earth and proud as hell of it, so don't ever call me a Polack.