go off the rails

idiom

Definition of go off the rails

informal
: to lose control and start to behave in a way that is not normal or acceptable He was a promising student but he went off the rails after he started taking drugs.

Comments on go off the rails

What made you want to look up go off the rails? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

providing supplementary assistance

Get Word of the Day daily email!

Test Your Vocabulary

Farm Idioms Quiz

  • cow coming home
  • What does 'poke' refer to in the expression 'pig in a poke'?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Syn City

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!