fall flat on one's face

fall (flat) on one’s face (be completely unsuccessful at a task, fail to achieve a desired effect; || fail or make a mistake in an embarrassing way; make a blunder or error of judgment) — потерпеть фиаско, неудачу, с треском провалиться; облажаться, лажануться; выставить себя дураком

Example 1: That weatherman keeps falling flat on his face with his predictions. (answers.com)

Example 2: The new scheme / plan / project fell flat on its face in spite of all the financial support that was given.

This term, first recorded in 1614, originally had the literal meaning of "prostrate oneself in reverence." The present colloquial usage, however, transfers a physical fall to various kinds of bungling. (answers.com)

see also
[потерпеть фиаско]

[put one's foot in it]
[egg on one's face]
goof up
slip up
mess up
screw up