the.com/debacle

means A sudden, humiliating collapse or failure — so total it goes beyond mere mistake into spectacle.

from From French débâcle, originally meaning the breaking up of ice on a river — the violent moment when a frozen jam cracks and everything crashes downstream at once. The French verb débâcler meant to unbar or clear away, picturing a flood of chaos released all at once. English borrowed the word in the 1800s, keeping that sense of sudden, overwhelming collapse but pointing it at disasters, scandals, and failed plans instead of rivers.