Noun. An act of intense self-destruction. A suicidal act. Usually harms many people, not just the person committing the act. Often causes those witnessing the act to facepalm or exclaim in a loud voice "Why?".
Bob: "I'm going to ask a bunch of completely uninformed people to make all my decisions for me from now on. Leadership is too difficult!"
Sue: "Oh no Bob, not another Greek Referendum...."