eat humble pie字面意思用鹿等动物内脏做的馅饼，引申为屈辱；道歉赔不是；承认错误。

【例句】
When she realized her mistake, she had to eat humble pie.
她知道自己的错误了，只好赔礼道歉。

You should stand straight, you needn't eat humble pie.
你应该挺起腰杆，你用不着低三下四。