What does POSH stand for?
POSH stands for "Port Out, Starboard Home" in nautical
terminology. Posh is a word of unknown derivation but there is no
evidence that it ever stood for the custom of a Steamship line
(usually P&O) stamping tickets POSH to ensure a shaded journey
to and from India. There are no examples of Acromyms before the
20th Century the word posh is older its possible derivation is from
the Romany cant word for money.