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.
See also:
  • keep on the straight and narrow
  • keep to the straight and narrow
  • keep to, stay on, etc. the straight and narrow
  • stay on the straight and narrow
  • stay to the straight and narrow
  • on the straight and narrow
  • opportunity makes a thief
  • be honor-bound to (do something)
  • feel duty bound to (do something)
  • feel honor-bound to (do something)