Sentence:  Most New Orleans citizens . . . were used to the Kentucky riverboatmen, the <WSD>Kaintucks</WSD> others called them; they called themselves alligator-horses, and they were largely a rough and tumble breed. 
Meaning of the word marked with <WSD> tags:  A worker, especially one having a crude or rowdy manner, on a boat that transported commercial goods on the Mississippi River.