Weenus (or weenis or wenis) is a slang word for the excess or loose skin at the joint of one's elbow, which is technically referred to as olecranal skin. Olecranal is an adjective used in medicine that means "of, belonging to, or relating to the olecranon." The olecranon is the process of the ulna (one of the bones in the forearm) projecting behind the elbow joint.
