More so, a way of life, than a phrase. Many potheads/bros wouldnt be seen saying this, but others that arent bros or potheads would be. its a phrase or action to refer(or make fun of) to pot smoking bros that just wanna fight people and smoke ;D
Skate kid- "Hey man. lets go skate. maybe we can smoke a bowl and go bodies"
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.