Traysh

I was on a plane, and after we ate our snacks, one of the flight attendants told us that they were going around to pick up our "traysh." Seriously. It was like she added a "sh" to the word "tray". I'd never heard anyone pronounce "trash" that way before. I even heard someone near me imitate her accent, and I wouldn't be surprised if other people noticed it as well. I wonder if it's common in certain parts of the U.S. (such as the South?) to pronounce "trash" like "traysh."