From Longman Dictionary of Contemporary Englishfall through phrasal verbFAILif an agreement, plan, sale etc falls through, it is not completed successfully The studio planned to make a movie of the book but the deal fell through. → fall→ See Verb table
Examples from the Corpus
fall through• It was unbelievable -- it took two years to set the whole thing up and it fell through at the last minute!• The deal fell through because they couldn't get enough money from the bank.From Longman Business Dictionaryfall through phrasal verb [intransitive]COMMERCE if a deal, arrangement etc falls through, it does not start or is not completed successfullyWhen an offer to buy the airline fell through, Midway were forced to stop operating. → fall→ See Verb table 