A strange and magical place, which typically can only be reached through either a combination of large amounts of shrooms and the use of portable toilets, or prolonged exposure to the transcendent music of the band Phish. Phish guitarist Trey Anastasio was the first to describe the back of the worm; during a show in Amsterdam in 1997, in the middle of a creepy, ambient jam called Wormtown, Anastasio described to the audience his experience of being sucked into a public urinal and riding around on the back of giant worms. Very few others have been lucky enough to experience The Back of the Worm, but most of the people who have did so at Phish concerts.
I think you know where you are. ...YOU'RE ON THE BACK OF THE WORM! Seriously, though, stay away from those portable toilets in Amsterdam.
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.