n. A source of all knowledge. Usually on a particular subject (e.g "The Stargate Omnipedia, "The Star Trek Omnipedia") but can theoretically be used to describe a source of literally ALL knowledge.
It is distinguished from an enclyclopedia by not needing to be short or to the point. It can include everything on the subject matter.
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.