peepshow

noun

Etymology: From peep + show.

1. An exhibition of pictures or objects viewed through a small hole or magnifying glass.

   “Beautiful peepshows with hand-coloured engravings by Martin Englebrecht, 1684-1756, were produced in Augsburg about 1740. The box, about six inches cube, contained slots to take four cut-out scenes, the front of the box had another cut-out, and the back was painted with a landscape, making six 'curtains' in all.”

2. A titillating or pornographic display viewed through a small slot, generally equipped with a timer to automatically close the slot when payment has expired.