sheep’s eye
/ʃiːps aɪ/in the idiom "to make sheep's eyes at someone") refers to casting a shy, longing, lovesick, or amorous glance.
noun [具体名词] 媚眼,含情脉脉的一瞥
He sat across the cafe making sheep's eyes at her the entire afternoon. 他整个下午都坐在咖啡馆对面,对她投以含情脉脉的目光。