fall flat on your face

US /fɔl flæt ɑn jʊər feɪs/
UK /fɔl flæt ɑn jʊər feɪs/
"fall flat on your face" picture
1.

彻底失败, 栽跟头

to fail completely or to be unsuccessful in an embarrassing way

:
His grand plan to impress the boss fell flat on its face.
他想给老板留下深刻印象的宏伟计划彻底失败了
The comedian's new jokes fell flat on their face with the audience.
这位喜剧演员的新笑话在观众面前彻底失败了