One that likes to put different things into his rectum during masterbation, Normally exotic items such as pineapples, staplers, little powdered donuts, Loaded baked potatopringles, ect..
When your feces starts bobbing itself in and out of your anus because you have to take a big shit but can't find a bathroom and can barely hold it in. Similar to a prairie dog popping in and out of the ground