fall flat on your face

Meaning

1. 1

   to fall so that you are lying on your front

2. 2

   to fail completely, usually causing embarrassment

   His next television venture fell flat on its face.

From the same entry

• and that's flat
• as flat as a pancake
• on your back
• in a spin
• on the flat
• fall flat
• flat broke
• flat out
• in… flat