Hush Shopkeeper
New York Times Co. / Hulton Archive / Getty Images
These savvy workers existed during prohibition in the United States. Their main job was to sell liquor on the down low to anyone who they trusted. They received the name because they had to be quiet about selling illegal substances. Eventually, prohibition ended and hush shopkeepers no longer needed to be quiet about the sale of liquor. This is an interesting entry because the shopkeeper job still existed after prohibition ended but the function of the workers changed very quickly.