Turning off someone's music that is playing loud enough for everyone at work to hear, followed by turning yours on. Therefore "tunejacking" the music that you and other people are listening to, from one person's computer or radio to yours.
"Dude, as soon as Nick went to lunch, and left his death-metal music playing, I tunejacked him! ha!"
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.