Wiktionary
yiss
interj. (eye dialect of yes English)
Usage examples of "yiss".
Oh yiss, dey do believe dey's de smartest t'ings God put on dis old cart' .
The Fox is bound to barter him for an ally—a daughter of the high march of Yiss, perhaps, or a rich Darthacan noblewoman, and Chalion will have lost its chance!