originally used when someone acts like a father fucker....
1. insult
2. someone really humps your head 3. when a man humps the girl giving him a blow job at the moment
HEY!!!u mother fucking father fucking humphead piece of shit!!! suck my hairy cock u fucing cuntass father fucker
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.