posh / päsh/ inf. • adj. elegant or stylishly luxurious: a posh Munich hotel. ∎ chiefly Brit. typical of or belonging to the upper class of society: she had a posh accent.• adv. Brit. in an upper-class way: trying to talk posh.DERIVATIVES: posh·ly adv.posh·ness n.ORIGIN: early 20th cent.: perhaps from slang posh, denoting a dandy. There is no evidence to support the folk etymology that posh is formed from the initials of port out starboard home (referring to the practice of using the more comfortable accommodations, out of the heat of the sun, on ships between England and India).

posh (sl.) tiptop, ‘swell’. XX. of unkn. orig.