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.