be on the straight and narrow

be on the straight and narrow

To maintain a morally upright way of life; to only make choices that are considered morally and legally correct. Now that I have a conviction on my record, I really have to be on the straight and narrow going forward. My father was on the straight and narrow until the day he died, and I think he regretted never doing anything wild or unexpected when he had the chance.

See also: and, narrow, on, straight

Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.