One who Spackles the toilet bowl with explosive shit. See also shit spackle
"Just look at that toilet you fucking shit spackler!"
"Kevin you shit spackler that bathroom was clean before you got here"
Someone who is so shitty that their shit spackles a great distance and covers a large area.
That shop owner that fleeced his loyal customers out of their hard earned SSI money sure is a giant shit spackler.