Yours, Etc.: Origins and Uses of 8 Sign-Offs
also chop-stick, 1690s, sailors' partial translation of Chinese k'wai tse, variously given as "fast ones" or "nimble boys," first element from pidgin English chop, from Cantonese kap "urgent." Chopsticks, the two-fingered piano exercise, is first attested 1893, probably from the resemblance of the fingers to chopsticks.
(from Chinese kuai-tzu, "quick ones," by way of Pidgin chop, "quick"), eating utensils, consisting of a pair of slender sticks held between the thumb and fingers of one hand, that predominate in much of East Asia and are used in conjunction with East Asian-style cuisine worldwide.