pop-eyed

US /ˈpɑːp.aɪd/
UK /ˈpɑːp.aɪd/
"pop-eyed" picture
1.

目を見開いた, 目が飛び出そうな

having bulging eyes, typically as a result of shock, fear, or excitement

:
He stood there, pop-eyed with astonishment, as the magician made the rabbit disappear.
彼は手品師がウサギを消すのを見て、驚きで目を見開いて立っていた。
The sudden loud noise made the cat pop-eyed.
突然の大きな音で猫は目を見開いた