A piece of toe nail clipping (from the big toe) is wedged between the two front teeth of a sleeping (or passed out) victim. If done right the victim should have a very hard time pulling out the abstruction.
Similar to the dirty sanchez, while doggy style, sticking your pinky into the girls ass then reach around and poke her in the mouth. The point is to leave some brown on her front teeth.
"Last night I gave this drunk Freshman a dirty sanchez and when she screamed I doubled it up and gave her a Dirty Toothpick.