pin-up

Short definition from Wiktionary

Noun

1. 1
   A photograph, printed in a magazine or other publication, of a sexually attractive person (often nude or provocatively dressed), and intended to be removed and pinned up on a wall.
2. 2
   The person so depicted.
3. 3
   Figurehead, person who represents an idea, cause etc.

Verb

1. 1
   To put (e.g. a sheet of paper) on display, using a pin.