Loud woman #1: My friend is on that. When you fart, it makes you shit oil.
Loud woman #2: Re­al­ly?
Loud woman #1: Yup, you shit oil and grease.

http://overheardinphilly.blogspot.com/2007/08/exxonmobil-is-now-in-pharmaceuticals.html

Over­heard by: grossed out