slang. or dial. Also knepper, napper. The knee.
1764. T. Brydges, Homer Travest. (1797), I. 237. The bully on his bare Kneppers knelt down. Ibid., II. 243. On his knappers down he dropp’d.
1877. N. W. Linc. Gloss., Nappers, the knees.
