The term 'complete debacle' is a synonym for the word 'FIASCO, ' which is defined as a complete failure or a disaster. It is often used to describe a situation that has gone wrong in a spectacularly embarrassing way. The term is often used to describe a situation where a plan or project has gone awry, resulting in a complete failure. In other words, it is a situation where everything has gone wrong and there is no hope of recovery.