Yowza is an interjection used to express surprise, excitement or exclamation. It can also be used as a substitute for other words such as "wow", "oh my goodness," or "holy cow."
Nothing basic about those boots, though - yowza!! (stylingmylife.com)
Yowzas Beach Cottage ladies, all I can say is yowzas on the DIY beach decor table and its progress, come on in and have a nosey, you are gonna lurve it I believe! (abeachcottage.com)