I admire so much in each of the stories-- there's craft, suspense, lots and lots of feces :)--but I have to give my vote to @marcoriccardi on at least two counts:
1]I don't think I would have posted my far out piece about pooping cockroaches if Marco hadn't jumped into the fecal universe with such gusto
2]I don't know how he came up with some of those gems:

a probable concretion of fossil catarrh of the late post-hangover

sewer apocalypse

thick rubber apron with heraldic symbols and a pair of golden rubber gloves

Association of Coprolite Hunters,

rare sphenoidal fecaloma

I knew my piece could never be more over-the-top than his.
So, Marco, bravo!