the very intense sudden cramping then disappearance of pain near the abdomen due to the very urgent need to release one's bowels. Similar to contractions from baby labor, however releasing poo instead of a newborn.
A hardo is a person who tries extremely hard at everything. Most times a hardo will try very hard at things that do not require excessive effort. For example, sports practices, gym class, etc.
Wow did you see Jack at practice today? What a hardo!