Now where does all that waste go? The large intestine that is where. The waste goes down and down until it gets to almost the bottom of the large intestine(about 5 feet long) where it comes upon the colon. The colon sucks out the remaining water, and then the big brown, or feces is formed. The large intestine pushes it into the rectum where it sits until your ready to use the restroom.when you use the restroom you push the big brown through the anus into the toilet and meanwhile this process continues on and on. Now is that something to chew on or what?