A term most often used when describing the female genitalia region. short midgets, vertically challenged fameles can be refered to as a " short box". This term ( nickname ) is most popular with larger than average males who tend to over compensate for mos insecurities.
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.