Definition of "zowie"

Zowie, what a walloping those Browns got in New York yesterday! A few more like that and the blow-up in Washington, then watch the anvil chorus in St. Louis.

1908 July 17, Thomas S. Rice, “Nationals Swat at Lively Clip Until New Orleans Steps Into Breach.”, in The Washington Times‎, Washington D.C., archived from the original on 2016-11-07, page 10