unlicensed taxi; illegal cab
Colloquial term for a private car used as an illegal taxi, often distinguished from licensed taxis by its white license plate.
An unlicensed taxi is waiting for passengers in front of the station.
Operating an unlicensed taxi is prohibited by law.
Abbreviation of 白ナンバータクシー (white license plate taxi), referring to private cars with white plates used as illegal taxis.