"Not Nayn't Untheen't" Is the most powerful overwhelming version of "no u" Even overpowering both "Nay Thee" and "Yesn't Men't" if any more powerful word is spoken the world with collapse on itself so this is the most powerful "no u".
Bob: Your mom gay
Dave: no u
Bob: "Drips in blood" Nay Thee
Dave: "Throws up blood" YESN'T MEN'T
Bob: "About to Implode" Not Nayn't Untheen't
Dave: "The air around him becomes anti-matter as he is compressed in to a super compressed black hole and disperses into the nether realm"
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.