Talk Turkey

One of the odder genuine mysteries in American English. The most commonly told story involves a colonial-era hunting trip between a settler and a Native American man, in which the settler tried to divide up the day's catch by handing over the inedible birds and keeping the turkeys for himself, only for his companion to call him out with something like "you're not talking turkey to me." It's a vivid tale, but etymologists consider it apocryphal, an invented origin story rather than a documented event. The phrase is recorded in print from 1824, and reached a wider audience once it was printed in Niles' Weekly Register in 1837, but no source has ever confirmed where it actually began.