To lose one's mind, go crazy, insane, batshit psycho. Usually caused by lack of sleep, hyperactivity, sugar or plain ol' weirdness.
Erma has gone completely off the rack. We need to put her in a straightjacket and lock her in a glass box at a museum for the psychologically insane so that everyone can witness the true heights weirdness can attain.
Otherwise known as a mallgoth, an off the rack rebel will think they're so individual for shopping at Hot Topic and Strhess, while failing to realize that goth and punk were meant to break free of subcultures, and not conform to its own subculture. Also, a poseur.
mallgoth: Hey, look at me! I just got through with a Strhess and Hot Topic shopping spree! I'm such a rebel!
actual goth: Jesus, you're such an off the rack rebel!
It is said of the situation where a person has the bad luck to make contact with his testicles against an undefined surface or object, intentioned or not.
Given the nature of the word, it is more appropriate to design cases where the interaction is made with a moving object, for example, a ball.
Although it is extremely painful for the victim, it tends to be considerably funny to people who witness it.
Today in the baseball game the pitcher took a nutshot; the baseball hit him in the nuts.
Man, I just watched the funniest nutshot video ever.