When you can see a womans inner butt cheek from standing in front of her. The butt cheek behind her cooter. Most of the time it is when women are wearing really tight, really short shorts.
When she was standing on stage the audience had a very clearshot of her cooter back.
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.