off the straight and narrow

off the straight and narrow

Not or no longer living a morally upright way of life; making choices that are considered immoral and illegal. Now that I have a conviction on my record, I can't afford to fall off the straight and narrow going forward. My father never went off the straight and narrow, and I think he regretted not doing anything wild or unexpected when he had the chance.
See also: and, narrow, off, straight
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.