Jump the rails
phrase
To suddenly change situation, generally not in a good way.
The project had been going smoothly, but it totally jumped the rails when our main investor pulled out.

Often appears as...
- things went smoothly until they jumped the rails
- project jumped the rails
Usage tips
Idiomatic
phrase
For a vehicle (often a train) to derail or leave its tracks.
In horror, we watched as the speeding train jumped the rails.

Often appears as...
- train jumped the rails
- vehicle suddenly jumped the rails
phrase
To suddenly change situation, generally not in a good way.
The project had been going smoothly, but it totally jumped the rails when our main investor pulled out.

Often appears as...
- things went smoothly until they jumped the rails
- project jumped the rails
Usage tips
Idiomatic
phrase
For a vehicle (often a train) to derail or leave its tracks.
In horror, we watched as the speeding train jumped the rails.

Often appears as...
- train jumped the rails
- vehicle suddenly jumped the rails
Definition 1 of 2

Negative Connotation
Implies an unexpected negative turn in events or plans.

Our vacation jumped the rails when the storm hit.
Metaphorical Usage
Used metaphorically to describe plans or processes that fail.

The negotiations jumped the rails after the disagreement.
Conversational Tone
Common in spoken English and informal situations.

It seemed like an easy task, but it really jumped the rails.
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