http://en.wikipedia.org/wiki/Gastrocolic_reflexMaybe the gastrocolic reflex?
I once drank a quart of apple juice, with similar results.
I have no idea why, but on the GQ main page when I saw:
“What does one have when one poops oil? Ellen Cherry”
It grossed me out. :: shrug :: Not sure why. Maybe it was like “Ellen Cherry” was the name of a stomach ailment or something.
For shame - Ellen Cherry is a lovely username!
It was the fish. Apparently, this fish’s name in Chinese translate to something like “oil fish”.
Too bad though, it was delicious
Could be a gallbladder problem. When my GB failed–and for some time after I had it removed–“oily poop” is what I mainly generated for the better part of a year. But I am SO not a doctor.