Unmarked, unlicensed cabs, (usually vans) common in the "bad" areas of Brooklyn. Dollar Cabs take multi-passengers (as many that can fit) to a nearby landmarks/train stations safely during late night hours or when train stations are closed.
Dude...thought i was going to get mugged walking to the next station when the Parkside ave stop wasn't running. Luckily a dollar cab pulled up and took me to Atlantic Ave.
a dollar cab is a bus or other form of transportation that cost a dollar
i rode the dollar cab today