Coined from How I Met Your Mother, Future Ted mentions the time new upstairs neighbors moved in, and proceeded to have loud sex on a regular basis, which he euphemistically describes as "playing the bagpipes" to his children. (November 2, 2009). It also can refer to f**k or f**king.
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.