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to run on fumes
01
to continue functioning despite being extremely tired
![to [run] on fumes definition and meaning](https://cdn.langeek.co/photo/40369/original/?type=jpeg "to [run] on fumes definition and meaning")
Idiom
InformalWhat is the origin of the idiom "run on fumes" and when to use it?
The exact origin of the idiom "run on fumes" is unclear, as it has become a common idiomatic expression in the English language. The usage of "fumes" in this context likely stems from the idea of a vehicle running on the vapors or remaining traces of fuel, indicating that it is nearly out of gas.
Examples
I'm running on fumes — did n't sleep last night.
The team is running on fumes but still giving their best effort to finish the project.
02
to operate with almost no fuel left
Examples
The car was running on fumes by the time we found a gas station.
The boat ran on fumes back to the dock.
