A person so insecure that he/she talks to young girls on the internet in hopes of getting some. Also a person whose head is so high up in the clouds that he/she can't tell the difference between his/her dreams and reality. Also has a small penis.
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.