a police wagon or van for transporting those who have been arrested. The etymology is uncertain beyond the colour black US, 1843.
2
in a deck of cards, the queen of spades US, 1988.
3
highly potent marijuana UK, 2001
Black Maria
dated A police vehicle, typically one carrying prisoners. Man, there's the Black Maria. Looks like I'm headed to a different jail.They just threw Billy in the back of a Black Maria and hauled him off to the police station!