Definitions by Neumonic
Pit and the Pendulum
A sexual position in which the female lays in the jackhammer position and the male enters her from the front with his ass hanging over her face. He will then defecate (note: it must be a log or the metaphor won't work) and let the log swing back and forth before it falls, thus "The Pit and the Pendulum."
Pit and the Pendulum by Neumonic July 5, 2010