Wiktionary
a. (context idiom informal English) posh, upper-class; pertaining to the upper crust.
Usage examples of "upper-crust".
All this experience with older, upper-crust white ladies was doing nothing to help her understand one older Chinese lady in particular, namely, Yun Yun.
Bristol Hotel, a famous and very upper-crust accommodation known particularly for its superior dining room and its nearness to the State Opera, which sat just across the street, consecrated to the memory of Wolfgang Amadeus Mozart, who had been the court musician for the House of Hapsburg before dying an early death, right here in Vienna.
The MO was identical in all four cases: liquor stores catering to upper-crust negroes were hit at night, half an hour before closing, when the cash registers were full.
With his outsize cranium, his mane of yellow hair, his petite body, and his arrogant freakishness, Van Dusen can't be imagined as welcome among the upper-crust British.
Onions, big, broad, blunt and Lancashireon his feet glad-handing Crawleyan austere, upper-crust copper with the throttled vowels of the Edwardian age, hair almost a coiffure, a pencil-line moustache written on his top lipand Nailer, like every Special Branch copper Troy had ever met, unimaginatively neat, but unimaginatively plain.