noun
black-market broker
Refers to an intermediary who illegally trades goods, currency, or services outside official channels.
戦後の混乱期には、闇ブローカーが食料や物資を高値で売りさばいていた。
In the chaotic postwar period, black-market brokers sold food and supplies at high prices.
警察は、外貨を不正に取引していた闇ブローカーを逮捕した。
The police arrested a black-market broker who was illegally trading foreign currency.