This is the base when you fuck a girl in a banana suit on the moon with an audience of Chinese four-year olds sitting on diamond-encrested llamas wearing toupees made from shaved cow fur sewn together with cum and glue. Also, there is a raja judging whether or not it is good while him and Adam Sandler kiss eachother. This is the base that Chuck Norris won't be able to get to.
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.