Omentum: A sheet of fat that is covered by peritoneum. The greater omentum is attached to the bottom edge of the stomach, and hangs down in front of the intestines. Its other edge is attached to the transverse colon. The lesser omentum is attached to the top edge of the stomach, and extends to the undersurface of the liver.
The word is derived from the latin meaning "Apron". Perhaps there is something symbolic about Osama Obama and Oprah's apron strings.