The name of the deformed pokemon mascot. They were going to make Clefairy the pokemon but instead people liked Pikachu more so they made Pikachu the mascot. So a Clefichu is when half the people liked Clefairy and and the other half liked Pikachu.
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.