Using the free Starbucks coffee house wireless internet access without going inside the store to order coffee.
I drove my car to Starbucks, pulled into a parking spot up front, kept the motor running, whipped out my laptop and did some starjacking. I emailed all my friends for free!
To post on social media first someone else's sad news or story or announce someone else's bad news before they have had chance to post or were waiting a bit because it was still to painful or a secret. To hi-jack someone else's bad news. To hi-jack sadfishing. To gain sympathy and likes yourself, taking sympathy and responses away from the person who it actually happened to.
e.g. "John was going to tell everyone that he had a tumour but his mate Paul sadjacked him by posting about it first" or "I heard my mate's friend had died and sadjacked him by posting the news before him" or "some **** is sadjacking my cat's death on fb"
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.