Dictionary.com Thesaurus.com

shit-eating grin

American

[shit-eet-ing grin] / ˈʃɪtˈit ɪŋ ˌgrɪn /

noun

Slang: Vulgar.

a smug, self-satisfied, or gloating smile.

Etymology

Origin of shit-eating grin

First recorded in 1945–50

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.