high-class
high-class {adj.}
Of the best quality; very good; superior. — Avoided by many careful speakers.
When Mr. Brown got a raise in pay, Mrs. Brown started to look for a high-class apartment.
Mrs. Smith always gets her clothing at high-class shops.
Mr. Jones always gets his office workers from Burns Agency because they have high-class help.
Compare: FIRST-CLASS.
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Source: A Dictionary of American Idioms