Pin-up model

A pin-up model (known as a pin-up girl for a female and less commonly male pin-up for a male) is a model whose mass-produced pictures see wide appeal as popular culture. Pin-ups are intended for informal display, i.e. meant to be "pinned-up" on a wall. Pin-up models may be glamour models, fashion models, or actors.

These pictures are also sometimes known as cheesecake photos.

The term pin-up may refer to drawings, paintings, and other illustrations as well as photographs (see the list of pin-up artists). The term was first attested to in English in 1941; however, the practice is documented back at least to the 1890s.

The pin-up images could be cut out of magazines or newspapers, or on a postcard or lithograph. Such pictures often appear on wall or desk calendars. Posters of pin-ups were mass-produced and became popular from the mid 20th century.

Male pin-ups were less common than their female counterparts throughout the 20th century, although a market for homoerotica has always existed as well as pictures of popular male celebrities targeted at women or girls. Examples include James Dean and Jim Morrison.