The sound of farting is often referred to as "flatulence." Flatulence is the release of gas from the digestive system through the anus. It can be caused by a variety of factors, such as the digestion of certain foods or the fermentation of undigested carbohydrates in the large intestine. Flatulence can be accompanied by a sound, which is usually caused by the vibration of the anal sphincter or the movement of gas through the intestines. Some people might refer to the sound of farting as "passing gas," "breaking wind," or "tooting."