That burningin the back of your throat that doesn't really go away after you have nothing to throw up except stomach acid.
Matilda: "Oh my god did you see Grandma in her Canadian tuxedo and poodle perm hair tonight?"
Moe: "Ugh that made me Annie Oakley in my mouth a little bit"
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.