Russian Pin-up Girl Model

In comic books, a pin-up is simply a full-page piece of artwork, most often without dialogue, that showcases a character, group of characters, or significant event, published within an issue, rather than made available by itself as a poster.
In professionally published fan magazines for films and television series, a posed photograph of actors or actresses from the subject matter, but which might also showcase specific scenes from the subject matter in photograph form (called stills) are occasionally called pin-ups. The label is very casual, though, as these types of fan media are more accurately described as posters.
Pin-ups are also referred to as "cheesecake", the male counterpart being "beefcake".