be shameless
... 刮目相看 look at sb differently/with new eyes/regard sb in a totally different light 寡廉鲜耻 be shameless 毫无怨言 without complaint ...
寡廉鲜耻,汉语成语,拼音为guǎ lián xiǎn chǐ,旧指不廉洁,不知耻;现指不知羞耻。出自《喻巴蜀檄》。