To shit on your girl or hoe's chest while spinning in a circle. The when the poo is curly you cut your pubes and put the shavings on top for sprinkles and then ejaculate on top for the icing =Chocolate Twisty with Sprinkles and Icing!
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.