1. To self-destruct, melt-down or implode under the weight of one's own arrogance. 2. To fail spectacularly, particularly in matters of warfare or diplomacy; to plunge into chaos. 3. Absolute, unmitigated disaster of national or international proportions and consequence; policy failure so utterly abject and miserable as to approach the realm of the epic.
"Although long considered to be a costly and murderous fiasco, the prisoner abuse scandal revealed the war in Iraq to be nothing short of a rumsfailure." See also: "Karma"