It's a very mannered, decorous language.

是一种非常礼貌且高雅的语言。

耶鲁公开课 - 1945年后的美国小说课程节选

Yeah, I don't know, Hugh Grant, you know, he's good-looking guy, very posh accent, strong accent, so.

休•格兰特，他长得很好看，讲话非常高雅，有很重的口音。

英国电影的魅力 - SpeakingMax英语口语达人