A potentially severe event which takes place during the act of dropping a deuce. When taking a shit of monumental proportions, your mammoth shit may impact the water of your toilet with such a tremendous force that it causes a geyser of cold shit water to erupt and hit your anus. Is highly unsanitary if no one flushed before you. Side effects of the shit spit include but are not limited to: briskly awake feeling, disturbance, loud slpashing noises, and a sense of needing to wipe an extra time.
Person A: Gimme just a sec...
*loud splash noise*
Person A: Oh fuck.
Person B: What's wrong mah man? You almost done in there?
Person A: The water stabbed me in the ol' poop chute!
Person B: You, my nasty sir, have just experienced a shit spit.
Person A: Man, fuck this...