Unlike the typical blackout that occurs after a hard night of drinking where you can't remember things you did the night before; "rolling blackouts" occur in real-time throughout the actual night of drinking.
George was so fucked up last night that he was having "Rolling Blackouts", he kept asking when we were going to order dinner after we had already ordered and eaten. Then he got upset when dessert came saying, "this is interesting, dessert BEFORE dinner!"
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.