Adverb
(comparative more off the rails, superlative most off the rails)
- (idiomatic) In an abnormal manner, especially in a manner that causes damage or malfunctioning
- (idiomatic) Insane.
- (idiomatic) Off the intended path.
- (idiomatic) Out of control.
Usage notes
- Most commonly used with the verb "to go", but also with forms of "to be", "to come" and others.
Origin
From the derailment of a locomotive
