Could be this, Bob
Guugu Yimidhirr (Aboriginal language of northeast Australia) ga
https://www.aulro.com/afvb/images/im.../2013/11/1.jpgurru.]
Word History: A widely held belief has it that the word
kangaroo comes from an Australian Aboriginal word meaning "I don't know." This is in fact untrue. As a result, it was assumed that Captain Cook had been mistaken, and the myth grew up that what he had heard was a word meaning "I don't know" (presumably as the answer to a question in English that had not been understood).