低三下四

cóng lái méi yǒu xiàng rén dī sān xià sì

从来没有向人低三下四

have never gone crawling to anyone

dī sān xià sì de qiú qíng

低三下四地求情

go bowing and scraping to somebody for a favour

bù yòng xiàng lǎo bǎn dī sān xià sì

不用向老板低三下四。

Do not go crawling to the boss.