To be fawning and smirking; to act shamelessly ingratiating.
他总是嘻皮涎脸地跟同事开玩笑，有时让人觉得有些轻浮。
He always jokes around with colleagues in a fawning and smirking manner, which sometimes makes people feel a bit frivolous.
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To be fawning and smirking; to act shamelessly ingratiating.