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Mongolian idiocy

American

noun

(often lowercase)

(no longer in technical use; now considered offensive) Down syndrome.

Other Word Forms

Mongolian idiot

noun

Etymology

Origin of Mongolian idiocy

First recorded in 1890–95

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.