black-market

Short definition from Wiktionary

Adjective

1. 1
   Traded on the black market.
2. 2
   Contraband, bootleg or smuggled.

Verb

1. 1
   To participate in a black market.
2. 2
   To sell in a black market.

Noun

1. 1
   Trade that is in violation of restrictions, rationing, or price controls.
2. 2
   The people who engage in such trade, or that sector of the economy.