Hey Dwight: I'm glad you brought that up! In Radio Days, bandleader Ben Bernie used that as a positive expression for the dance music he broadcast from his Ballroom location. "And here's another evening of dance music from the Old Maestro Ben Bernie...Yowzah, Yowzah, Yowzah!" It was a commonly -used expression throughout the 1930s and 1940s and even later. It was roughly equivalent to "Yessir". I always liked it! Hal (Wife's name is Judy)