Posh

a posh restaurant, hotel, car etc is expensive and looks as if it is used or owned by rich people 〔餐馆、酒店、汽车等〕高档的，豪华的
a posh private school
昂贵的私立学校

British English upper class 上流社会的
Her parents are terribly posh.
她父母是十足的上流社会做派。
posh2

adverb

British English informal

talk posh informal to talk in an upper-class way

用上流社会腔调说话