He then told me that he and his friends referred to Native Americans as "Woo Woo Indians." I'd never heard that one before.
Tick Tock Toys--Welch's Grape Juice
WooWoo! An entire series of cartoons for you....
The Welch's Grape Juice packages show two stereotypical Indians named Pow and Wow chasing a fox named Foxy Loxy as he takes Welch's products. They're about what you'd expect from a mid-20th century ad: big-nosed, half-naked caricatures speaking in Tonto talk. The image below is representative.
For more on the subject, see Native Comic Strips vs. Comic Books.