The well recognized first word to the song "Won't Get Fooled Again" by The Who, as the OP for CSI: Miami. This has been used at the butt of jokes using the Horatio Caine meme. (In actuality, the word is spelled "Yeeaaahh (with an indefinite amount of h's)" on the image.
"H, a woman jumps in front of a man's car and gets run over. Who's fault is it?"
"Well... why is the man... driving in the kitchen?"
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.