drug lord; drug baron
Refers to the head of a large-scale drug trafficking organization.
その麻薬王は国際手配された。
The drug lord was placed on an international wanted list.
麻薬王の逮捕は大きなニュースになった。
The arrest of the drug baron became big news.
Compound of 麻薬 (mayaku, 'narcotic drug') and 王 (ō, 'king').