Fall flat on your face - To fail badly, often in an embarrassing way. Imagine someone walking confidently but suddenly tripping and falling directly on their face—it’s not just a fall, but an awkward and obvious failure. This idiom is used when someone’s attempt at something goes completely wrong. Examples: • He tried to tell a joke at the meeting, but no one laughed. It completely fell flat on his face. • She launched a new business, but it fell flat on its face due to poor planning. • I tried