A pseudo-sexual act in which the male (ideally one that is vertically endowed, with large hands) straddles the female whilst stretching the scrotal epidermis over his clog wearing partner's forehead. The ideal effect is such that the female appears grandmother like, due to her new wrinkly, veiny forehead.
"My girlfriend just came home with a pair of clogs, I fear she may want to perform the Danish grandma."
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.