A dirty turtle is when you are fucking a girl (or guy) from behind on the floor. Just as you are about to ejaculate, you run their head into the wall, knocking them out unconcious. Once knocked out, ejaculate all over their stomach, and watch them while they lay on their back helplessly, just like a turtle.
My girlfriend woke up on the floor in a state of confusion after i gave her a dirty turtle.
by Rueskibob37 October 31, 2006