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The Best Internet Slang

Four Hundred

or 400

the exclusive social set of a city or area.
Origin of Four Hundred
An Americanism dating back to 1885-90; allegedly after the capacity of the ballroom in the mansion of Caroline Schermerhorn Astor, a leader of New York society in the late 19th century Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for Four Hundred

Four Hundred

(US) the Four Hundred, the most exclusive or affluent social clique in a particular place
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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