pin-up A photograph or poster of a provocatively posed, scantily attired woman, usually one of the latest sex symbols among female movie stars. The term was most popular during World War II when soldiers commonly pinned such photographs up on the barrack walls. An equivalent American slang term is cheesecake, which combines the conventional association of food and sex with the photographer’s cliché “say cheese,” used to make subjects smile. The male counterpart of cheesecake is beefcake, an American slang term for sexually provocative photographs of partially-clad men. Centerfold, the current term for such photographs, comes from the two-page spreads featuring nude or semi-nude models, popular in magazines such as Playboy and Play-girl

skin flick A movie that emphasizes nudity; a pornographic film. This expression, obviously derived from the blatant and frequent nakedness of cast members, describes erotic motion pictures which luridly depict sexual activity.