When a mans weiner is soft and he inserts it into a folded napkin and wiggles it around to make it hard and then proceeds to stick his junk into his own mouth and Suck it until he jizzes all over and squirts it out his nose.
When Josh got turned down by Bethany he decided to lock himself in his mothers bathroom and neenerstast as he cried uncontrollably.
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.