
1) Aristocratic 2) Chic 3) Chichi 4) Classy 5) Deluxe 6) Designed for the smart set 7) Dorset slang for having money 8) Dorset slang for smart 9) Elegant 10) Elegant and expensive 11) Elegant and fashionable 12) Elegant, British style 13) Elegant, London style 14) English play 15) Exclusive shop design
Found on
https://www.crosswordclues.com/clue/posh

1) Aristocratic 2) Classy 3) Deluxe 4) Dressy 5) Elegant 6) Lah-di-dah 7) Lavish 8) Luxe 9) Luxurious 10) Opulent 11) Pretentious 12) Ritzy 13) Stylish 14) Swank 15) Swanky 16) Swish 17) Tony 18) Upscale
Found on
https://www.crosswordclues.com/clue/posh

nonsense
Found on
http://phrontistery.info/p.html
Naval This word, meaning 'superior', is said to come from the P. & O. Steam Navigation Company's abbreviation for the phrase 'Port Outward, Starboard Homeward', which cabins are the cooler in the Red Sea and so the more attractive to passengers.
Found on
http://www.britishempire.co.uk/glossary/p.htm

Posh is British slang for stylish, elegant,
Found on
http://www.probertencyclopaedia.com/browse/ZP.HTM

Roughly translates as high class, though if you look at Posh Spice there are clearly exceptions to the rule! Comes from the cabins used by the upper class on early voyages from England to India. The coolest (and most expensive cabins) were Port side on the way Out and Starboard on the way Home.
Found on
https://www.encyclo.co.uk/local/22179
No exact match found.