The sound produced by the testis when a large, often muscle-bound black man is anally demolishing a stupid pot head teenager with his 12" monster. The black guy doesn't do it because he likes it, it is because the douche bag rich kid doesn't. It is a loud, audiable slap against the gooch area by the testis, often leaving a red silhouette of the black guy's balls.
The muscley black dude totally nigga slapped that dumbass pot head as punishment for looking at his Asian girlfriend.
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.