
Excess intestinal gas in the stomach or upper intestine usually results in excess burping or belching. Excess intestinal gas in the lower intestine may result in increased gas being expulsed through the rectum Excess gas remaining in either location can cause cramping or pain, often without an obvious pattern.
The list of euphemisms for gas passing is very large (300+ in English) and includes expressions such as passing wind, flatulence, flatus, fart, air, and toot.