1699 B. E. Hopper-arst, when the Breech sticks out.
1787 F. Grose Hoppet, a little basket, chiefly for holding seed-corn, worn by the husbandmen, in sowing, at their backs, whence a man with protuberant buttocks is compared to a man accoutered with a hoppet, and stiled hoppet-arsed, vulgarly hopper~arsed.