noun
EXAMPLES FROM CORPUS
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In fact there were complaints from upper crust visitors about the din, so the cells fell into disuse.
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In Harehills I belonged to the upper crust of the lower middle classes who were getting out as fast as they could.
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Only society's upper crust would have traveled in the car, known as the limousine of its day.
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The upper crust does not ride public transportation.
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Those disgraceful students were males from the upper crust .