a.k.a. Testicular Torsion: A painful twisting of the testicles that is usually caused by trauma but can also occur spontaneous. If left untreated can lead to partial or total death of the testicle or testicle(s). Term is used by Paramedics rooting from the medical term "Torsades de Pointes" which is unrelated to the testicles meaning: a twisting heart rhythm commonly called "Polymorphic Ventricular Tachycardia".
"man this kid is in pain after falling on a balance beam, now he's got Torsades de Balls"!