Here's a breakdown:
* Deal: refers to an agreement or arrangement, often involving a business transaction.
* Fell through: means the deal failed to happen. It implies a situation where something went wrong and the deal couldn't be completed.
Example:
"We were so excited about the new apartment, but the deal fell through at the last minute because the landlord changed his mind."
Other ways to say "deal fell through":
* The deal collapsed.
* The deal went sour.
* The deal was called off.
* The negotiations broke down.
* The agreement fell apart.