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copium

American  
[kohp-ee-uhm] / ˈkoʊp i əm /

noun

Slang.

  1. a metaphorical substance signifying that someone is engaging in self-delusion to deal with a loss or a difficult realization.

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.