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1.
Describing a car or other form of transport that is running very low on fuel.

Also an euphimism for very tired.
1. Its lucky we found this garage, look at the fuel guage, we were running on fumes.

2. The runner finished the marathon but later said to reporters that towards the end that he was 'running on fumes'.
by Blue Cawdrey November 27, 2004

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