n.
1.people who engage in illicit trade
2.an illegal market in which goods or currencies are bought and sold in violation of rationing or controls black_market v.
1.deal in illegally, such as arms or liquor
Idiom of the Day
let (something) off or let off (something)
to discharge a gun, to explode something, to release something
The children let off many firecrackers during the festival.