A person who when having sexual intercourse with his partner on pavement creates potholes and crushes it into gravel as a result. This is possible because during climax, the intensity of the intercourse is so vigorous and forceful.
Oh man Tyler he is such a Graveler. When he was bang his chick, there was gravel flying all over the place and he made this huge ass pothole. Holy shit.
A strange occurrence that is common in video games. It happens when you can't find something that you commonly see when you aren't looking for it. The effect is named after the 75th pokemon of the Kanto region Graveler and its tendancy to disappear when you look for it. This is surprisingly a very common effect.
Nerd 1: "I can't find my soul silver! It was right here all week!"
Nerd 2: "Its the Graveler effect."
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.