Gary Ablett was also - ironically - the name of a prominent Australian Rules football player who was involved in the controversial drug overdose death of a 20 year old woman - in Feb 2000 - who he had reportedly shared a full bag of 'Gary Abletts' (ecstasy tablets) and snorted heroin with.
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.