when a person let's one rip, but it sounds like a dog bark
kenny would come into work every morning, squat like he's trying to push out a log, then before you know it, "BARK , BARK " would come out of kenny's ass. within seconds old man Don would walk up front and say " who let the dogs out!" kenny would reply " hi don! that was only a fart bark!"
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.