idiom
too big to fail
非常に重要で倒産する可能性が低い会社や機関
Meaning
a company or institution that is so important that it is unlikely to fail
Example
Many financial institutions were considered **too big to fail** during the 2008 financial crisis.
2008年の金融危機の間、多くの金融機関は『大きすぎて潰れない』と見なされた。