ona dic eken 
posh [posh]
(
informal)
adjective (
comparative posh·er,
superlative posh·est)
for well-off people: elegant, fashionable, and expensive
adverb
U.K. like upper class person: like somebody from the upper classes
She talks posh to try and impress people.
[Early 20th century. Origin ?]
-
posh·ly,
adverb
-
posh·ness,
noun The legend has become widely circulated that posh is an acronym formed from the initial letters of
port out, starboard home, an allusion to the fact that wealthy passengers could afford the more expensive cabins on the port side of the ships going out to India, and on the starboard side returning to the United Kingdom, which kept them out of the heat of the sun. Pleasant as this story is, it has never been substantiated. Another possibility is that posh may be the same word as the now obsolete
posh "dandy, swell," a slang term current around the end of the 19th century. This too is of unknown origin, but it has been linked with the still earlier 19th-century slang term
posh "halfpenny," hence broadly "money," which may have come ultimately from Romany
posh "half."