Whenever you take a dump and you poop along with make a fart noise that is a result of air in the stomach, possibly heartburn. This fart will last more than ten seconds and is rather loud for a fart. It will sound like a 4 cylinder car shifting gears in fart form. It is possible that you can poop loosely too.
A four banger fart/dump sounds like a four cylinder car shifting gears and is very similar to shotgun pooping, but you do not feel a rush to go to the toilet. This poop will sometimes come out with force. The farting/poop sounds are more of an explaination for this. Four banger/fart dump, shotgun poop ( if there is a pause between the rushed dump as in diaherrea.
by Jon K of the Peach State March 21, 2009