摔趴下
to fall so that you are lying on your front
(颜面丢尽地)彻底失败
to fail completely, usually causing embarrassment
His next television venture fell flat on its face.他的下一个电视项目丢人现眼,彻底失败了。
释义来自《牛津高阶英汉双解词典》第 9 版