I. ˈpin-ˌəp noun
Date: 1943
: something fastened to a wall: as
a. : a photograph or poster of a person considered to have glamorous qualities
b. : something (as a lamp) designed for wall attachment
II. adjective
Date: 1941
1. : of or relating to pinups
male pinup calendars
2. : designed for hanging on a wall
a pinup lamp