Say what? - Phony

Something that is not genuine; a fake or imitation.

British thieves and swindlers of old used many secret codewords. One such word was fawney, which referred to a gilt ring. They would sell these, saying that they were made of real gold. But the rings were not genuine gold, and the word phony – from fawney – came to be used for anything that is fake or not genuine.

A famous phony product is the fake Rolex. Some people even run a complete business on somewhat strange phony products.