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English definition of “posh”

posh

adjective uk   /pɒʃ/ us    /pɑːʃ/
B2 informal (of places and things) expensive and of high quality: He takes her to some really posh restaurants. C2 UK informal (of people and their voices) from a high social class: A woman with a very posh accent phoned for him earlier. too posh to push informal humorous used for describing a woman who chooses to have a caesarean section (= a medical operation) when having her baby
posh
adverb uk   UK not standard us  
She talks dead posh.
(Definition of posh from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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