verb: The act of hitting a woman in the anus with a ball pin hammer, so as to tighten it to the point of puckering, prior to inserting your penis into said anus.
noun: A ball pin hammer used to preform the aforementioned act.
Katie and I got back from our date last night and were feeling rather frisky. So, I pulled up her dress and pulled down her undergarments and picked up my asshammer off the nightstand. With one mighty swing, one powerful thrust, and 3 pints of blood later, Katie had been asshammered.
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.