"a peek at your pose plastique"
Pose plastique is an alternative term for tableau vivant
(Fr. living picture).
A tableau vivant is generally a group of unmoving, silent people posed in such a way as to represent an event or theme; they were particularly popular during the 19th Century. Such representations could be viewed live or photographed for wider distribution.
As censorship laws permitted some nudity on stage so long as there was no movement, female actresses were sometimes posed in this way as a form of erotic titillation.