In Chile, fast food (burgers, hotdogs, sandwiches) usually involves mayonnaise and mashed avocado. Not as a sauce, side or dressing, though. No, here they are more like fillings. Whilst a quarter-pounder of avocado isn’t so bad, that much mayonnaise is just gross (and this coming from the girl who puts mayonnaise on everything).
So we avoided fast food in Chile. Even though it was tempting to order an ‘ass’ just to find out what it was. Instead, good old google came up with the answer: it’s an odd spelling of ‘as’ which means ‘ace’. So there you go. Next time you’re in Chile you can order one knowing its the best choice of hotdog swimming in mayonnaise that you’ll ever get.