Also known as simply, "Ouendan", Osu Tatakae Ouendan is a 2005 game originally made for Nintendo's 3DS, but later got reprogrammed by some random Australian guy named Dean "peppy" Herbert. It has a storyline, had some crappy animation, but was adapted in 2007 to a PC port, where you can click with a keyboard and move your mouse.
"Bro I've been getting into 'OsuTatakae Ouendan'! It's pretty fun ngl."
shige: "Hmm."
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.