The act of positioning your boner straight up you lower stomach to conceal it in public. It sits with the head pertruding from the top of your boxers.
So you’re in class and that hot exchange student who's V-card you've been wanting to steel decides to bend over to pick up her pencil. This nearly gives you a taste of her pussy sitting so visibly beneath her short skirt, but instead you’re left with a boner. Now without Plip'n your immobile, so by positioning it so that it can nestle into your belly button, it has become concealed.
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.