︎Brooklyn side
n.— «If a righty’s ball hits just to the left of the head pin, that’s called a crossover or, in the vernacular, hitting the Brooklyn side. Why? Bowling originated in the East, and a lot of its jargon came from there, especially New York, said a spokesman for the U.S. Bowling Congress. Going between Brooklyn and Manhattan in the early 1900s was considered a “crossover,” so crossover and Brooklyn became linked over time; a crossover ball was said to have gone to the Brooklyn side.» —“Ask! East side, west side” Rocky Mountain News (Denver, Colorado) Dec. 19, 2006. (source: Double-Tongued Dictionary)
Further reading
Imagine telling someone how to get to your home, but without using the name of your street, or any other street within ten miles. Could you do it? We take street names for granted, but these words are useful for far more, like applying for a job or...
See this.
Makes sense to me.
(I got this from a google of brooklyn side- also where you came up)