codpiece

noun2

1. •
   A conspicuous protection for the male genitals in a suit of plate armor.
2. •
   (historical) A part of male dress in the 15th and 16th centuries, worn in front of the breeches to cover the male genitals.

   • , Act III, Scene III, line 130. Borachio: Seest thou not, I say, what a deformed thief this fashion is, how giddily ’a turns about all the hot-bloods between fourteen and five-and-thirty, sometimes fashioning them like Pharaoh’s soldiers in the reechy painting, sometime like god Bel’s priests in the old church-window, sometime like the shaven Hercules in the smirch’d worm-eaten tapestry, where his codpiece seems as massy as his club?