fall flat on your face

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

徹底失敗, 栽跟頭

to fail completely or to be unsuccessful in an embarrassing way

:
His grand plan to impress the boss fell flat on its face.
他想給老闆留下深刻印象的宏偉計劃徹底失敗了
The comedian's new jokes fell flat on their face with the audience.
這位喜劇演員的新笑話在觀眾面前徹底失敗了