Howdy Dookie
The act of an individual inconspicuously inserting his or her hand into the clothing of another man or woman in a social setting. A finger is then inserted into the rectum and followed by inward and outward movement. The movement is continued as the recipient interacts with others in the social gathering.
After dinner, Bruce's mother barley kept from fainting when she removed the tablecloth, revealing Stephen's feces coated finger as it was swiftly pulled from Bruce's rectum after they were caught performing a Howdy Dookie.