on the wrong side of the tracks

on the wrong side of the tracks

In a part of a town or city that is particularly impoverished (and usually dangerous or undesirable as a result). His mother constantly warned him about spending time on the wrong side of the tracks.
See also: of, on, side, track, wrong
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

from/on the ˌwrong side of the ˈtracks

(informal) from or living in a poor area or part of town: She married a man from the wrong side of the tracks.
See also: of, on, side, track, wrong
Farlex Partner Idioms Dictionary © Farlex 2017
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References in periodicals archive ?
You'll hear that one big shot told another to go to hell, or laughed at him because he mispronounced a word and revealed that he grew up on the wrong side of the tracks. Then you ask someone else, and he doesn't remember it quite that way.