1. A person (generaly a fat male) who may have a sizable rectum, and (or) anus cheeks. They're called ass clapers because when they go the noise of these anus cheeks 'slaping' collectively makes a sound just like clapping. This can be heard way more plainly if the person is running or working.2. Male who wears tight pants that are generally many tight arround the anus. Ass clapers tend to be funny places to see because they have troubble moving their legs due to the rigidity.