An unspoken contract to give/receive Red Bull's between two coworkers. Whenever one of them buys a Red Bull on their way to work, they will buy one for their coworker too.
There is no requirement for an equal amount of giving and receiving. The contract remains fair as long as it remains unspoken.
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.