slapdash (adv.)

also slap-dash, 1670s, "in a hasty, abrupt manner, with or as with a slap and a dash," from slap (v.) + dash (v.). As an adjective, "dashing, offhand, careless," from 1792. As a noun, "rough-coat, coarse plaster," applied as a preservative to exterior walls, from 1796.

updated on December 16, 2022