Used to describe football fans going absolutely mental when their team has scored, much more than a normal celebration, mainly describing the 'limbs' (body parts) 'all over the shop' (aots), the action. Such as fans piling on to the pitch, storming the home fans, arms everywhere, people jumping all over the place.
Dave: Mate did you see the Watford fans when they scored in the last minute against Crystal Palace?
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.