1. The elimination of horrible fecal waste through one's anus, more extreme than the average process.
2. Taking an unbelievable shit to the point it's not a shit, it's taking a Bill.
3. A sweat-filled, terribly smelly, wet dump; one in which you must remove your shirt, can only be called taking a Bill.
4. A very time-consuming poop, usually requiring countless wipes and many flushes.
Frank: "Hey, what took you so long? I waited nearly 30 minutes."
Tom: "Screw you man, I was taking a Bill. It was horrible. The wiping would never end."
Frank: "Oh man, I'm so sorry. My bad bro."