Posh
British SlangDefinition
Upper-class or affluent; stylishly refined in speech, manners, or appearance—sometimes implying snobbery.
Examples
"She puts on a posh accent around clients, all crisp vowels and careful diction."
"We splashed out on a posh hotel in Mayfair, with doormen in tails and marble floors."
"Don’t get so posh about it—turning your nose up at the local chippy makes you sound snobbish."