fall through

(verb) to fail to occur, to not happen

Example Sentence:

I wanted to go to Cuba for my holiday, but my plans fell through when my friend got sick.

If your new job offer falls through, you can come and work for me.

My plans to meet Britney Spears keep falling through. It’s getting annoying!

Media:

Similar idioms:

1. on pins and needles
2. trainwreck
3. fire away
4. fall on hard times
5. epic fail