a person who is involved in the illegal trading of goods whose sale is not allowed or is limited or taxed

He runs a large network of black marketeers. 他经营着一个庞大的黑市商人网络。

She's a black marketeer who contacts her customers through the internet or by word-of-mouth. 她是一名黑市商人，通过互联网或口耳相传与客户联系。