n. Portmanteau of "spectacular" and "nutsack" denoting something to be awesome--usually used in either a sarcastic or tongue-in-cheek manner. Used only between males.
Annoyer: d00d, i just p00ned j00!
Annoyee: Yep. You're fucking nutsackular at this game. Words can't begin to describe the skill it took for you to kill me with a rocket launcher whose splash damage covers half the level.
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.