noun: A Greekmonster is the same as a greekmonkey(code name for gay anal sex) except the penis that is inserted into the other man's anus has NOT been circumsized..
Wbrasington, you need to buy a stronger brand of condom, your uncircumsized penis bore right through the condom last night while you gave me that Greekmonster and I've been leaking your man sauce all day...
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.