どんぐり眼まなこ

noun, noun which may take the genitive case particle 'no'

goggle eyes; big round eyes

Describes large, round, staring eyes, often compared to acorns. Can be used literally or figuratively, sometimes with a slightly comical or childish nuance.

• その子こはどんぐり眼まなこでじっと私わたしを見みつめた。