A Shingleberry is similar to its cousin the dingleberry, however instead of it consisting of faecal matter, it is composed of semen which attaches to a man's pubic jungle. This berry is extremely hard to remove and must be yanked away at the expense of a mans scream.
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.