Poop de grace pronounced /pu day gras/
(properly spelled "poop de grâce") is related to the French phrase "coup de grâce." While "coup de grâce" means "blow of mercy," "poop de grâce" means "poop of mercy." This comes about after eating skanky fast food, most notably Krystals or Taco Bell, where the grease accumulation in the affected person's bowels creates a "perfect storm" of indigestible foreign matter, well-lubricated intestines, and a lack of time to process the poisons put into one's body. The result is a nearly immediate post-consumption shit that proves that one's enjoyment of such eating establishments is a crime against God and man; the pain alone should make repeat practitioners consider themselves as recreating a perverse, modern form of self-flagellation. However, true to its name, the poop de grâce, once completed, offers relief that reaffirms faith in a Higher Order.
"Not ten seconds passed since he let the sixth krystal with cheese slip past his lips before the immediate and painful stabs of an incoming poop de grace were felt..."
"The chili cheese fry had taken its toll; that porcelain throne was never quite the same after Joe had taken his poop de grâce."