a large photograph, as of a sexually attractive person, suitable for pinning on a wall.
a person in such a photograph.
a device or fixture that is fastened to a wall, as a lamp.
of, pertaining to, or appearing in a pinup: a pinup girl.
designed or suitable for hanging or fastening on a wall: a pinup lamp.
1670–80 for general senses; 1940–45 as photograph of a pretty woman; noun, adj. use of pin up