casting a coquettish glance (at a man)
A yojijukugo describing a woman's flirtatious, alluring look directed at a man. Literary and somewhat old-fashioned; not used in everyday conversation.
She cast a coquettish glance at him, trying to get his attention.
色目 is a more common, everyday word for an amorous or flirtatious glance, while 媚眼秋波 is a literary yojijukugo with a classical feel.
A yojijukugo combining 媚眼 (flirtatious eyes) and 秋波 (autumn ripples, metaphorically a woman's alluring glance). The exact historical derivation is uncertain, but the phrase is used in classical literature to describe coquettish looks.