/blæk ˌmɑːrkɪˈtɪə/ – Phrase
Definition: người buôn bán chợ đen.
A more throughout explanation: A black marketeer is a person who engages in illegal buying, selling, or trading of goods or services outside of the official channels of commerce, often to avoid government regulations or taxes.
Example: The authorities arrested the black marketeer for selling counterfeit goods on the black market.