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demento

American

[dih-men-toh] / dɪˈmɛn toʊ /

noun

Slang.

plural

dementos

a deranged, mentally disturbed, or fanatic person; lunatic; nut.

Etymology

Origin of demento

dement(ed) + -o

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.