I. Black Ma ‧ ri ‧ a /ˌblæk məˈraɪə/ BrE AmE British English ‖ police wagon , or paddy wagon American English noun informal
a vehicle used by the police to carry prisoners
II. ˈpaddy ˌwagon BrE AmE noun [countable]
[ Date: 1800-1900 ; Origin: Perhaps from Paddy 'Irish person, (Irish) policeman' (18-21 centuries) , from the male name Paddy , from Irish Gaelic Padraig 'Patrick' ]
American English informal a police vehicle used to carry prisoners