A dirty aren is when someone dunks their testicles into a jar of peanut butter then proceeds to spread that peanut butter that’s on their balls onto a slice of toast then when the participant is next having sex they will nut into the piece of toast then feed it to their partner
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.