"one addicted to making saucy remarks," 1580s, sawcebox; see saucy + box (n.1). There never seems to have been a literal sense in reference to the "condiment" meaning of sauce; a sauce-boat (1733) was a small, lipped vessel for sauces, and compare saucer. A saucery (mid-15c.) was "a place where sauces are made."
updated on January 09, 2022