A fart produced after consuming vast amounts of soda.
Soda Farts are generally loud unless you're suppressing it in some way, but even then they make a rumbling noise unlike any other fart.
They are also known for their length, sometimes lasting several seconds.
Finally, the smell is more putrid than other farts, and will plague your area for a long time after it has been released.
After drinking large amounts of soda, I released one of the most brutal farts ever. It lasted for nearly 3 seconds, and smelled of death. This is the soda fart that they warned me about.