white-shoe

adjectives

denoting a company or law firm owned and run by members of the WASP elite who are generally conservative
"the politician tried to hide his white-shoe background"
white-shoe
is similar to
excluding much or all; especially all but a particular group or minority
"exclusive clubs"; "an exclusive restaurants and shops"
exclusive
domain usage
a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech
colloquialism