Term: (A word or expression you have seen in writing) Jock and Duff Your definition or explanation: Penis and Vagina Example: (An example of the term in use) Our conversation used to begin by my saying, "How is your duff?" "Oh! nicely, thank you; how is your jock?" "All right, and stiff, waiting for your duff One or more places you have seen the term: (Please give URLs/links to web pages, or a full description of a print publication.) http://www.my-secret-life.com/sex-diary-0111.php Have you looked for this term or meaning in dictionaries? Yes ____ No ___ Yes Have you found it? Yes ____ No ___Jo No I've seen both these expressions explained away by loads of people, both the jock meaning nothing to do with the penis, and the duff meaning dough explanation. This source is from about 1850, and predates all those explanations.