A successful attempt to evacuate one's bowels, but one that requires far more clean up than the average. Commonly, when time spent cleaning surpasses time spent defecating.
The opposite of a Flawless Victory, in which no cleanup is required after defecating.
Dude, I just had the worst Pyrrhic Victory, I had to flush 3 times to get all the paper down!
"Another dump like this, an we shall surely run out of toilet paper!" - King Pyrrhus of Epirus