noun
A glance directed sideways without turning the head, often implying a subtle, indirect look.
彼は流し目で時計を見た。
He glanced at the clock with a sidelong look.
noun
flirtatious glance; come-hither look
A sidelong glance used to show romantic or playful interest, often with a slight smile or coy expression.
彼女は流し目を送って、彼の気を引こうとした。
She gave him a flirtatious sidelong glance to get his attention.
Rare kanji form; 眄 is not a jōyō kanji.
横目 is a more general sideways glance, often neutral or disapproving, while 流し目 often carries a flirtatious or subtle nuance.
Compound of 流し (nagashi, 'flowing') + 目 (me, 'eye'), referring to a glance that flows sideways. The exact historical derivation is uncertain.