black market noun
plural ∼ -kets [count] : a system through which things are bought and sold illegally
▪ The black market in prescription drugs is thriving. ▪ They unloaded the stolen goods on the black market.
▪ The black market in prescription drugs is thriving. ▪ They unloaded the stolen goods on the black market.
— black marketeer noun, plural ∼ -teers [count]
