A wholesale copycat would be a knock-off of a designer label. The designer invests the time and money to develop a unique product, then someone steals the idea, gets some third-world country to produce the same product for about 20% of the price for the designer label.
It is hard to catch the wholesale copycat--which can be used to describe either the wholesaler who copies the original, or the product itself. It is illegal, but elusive when your design is a facsimile of the real product. When you also copy the label of the original designer, then the act is undoubtedly a felony.