bug-eyed

[ buhg-ahyd ]
/ ˈbʌgˌaɪd /
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adjective

with bulging eyes, as from surprise or wonderment; astonished.

Origin of bug-eyed

An Americanism dating back to 1920–25; bug1 + eyed
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for bug-eyed