The effect of one's head/brain being annihilated by an object,whether it be a blunt object or the bullet(s)/Shell(s) of a gun, and the inertia of the head is a bloody brain tissue mixture which either is sprayed or projectiled in every possible direction.
Joe: This guy cut me off on my drive over here and it really pissed me off!
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.