posh, adj. - ultra-smart, high-toned. It dates back to the heyday of Britain's Eastern empire, and is popularly believed to be an acronym of "port out, starboard home". On the ships taking Britain's imperial officials and their families to the Far East, the most sought-after and most expensive cabins were on the port side of the ship on the way out and the starboard side on the way home, because these were the ones most shielded from the strong sun.