run on fumes

The phrase "run on fumes" typically means to continue moving forward or operating despite having very little energy, resources, or fuel left. It is similar to driving a vehicle with an empty fuel tank, where one relies solely on the remaining fumes or vapors to keep moving until a refill can be obtained. Figuratively, it signifies working or pushing through a situation with minimal reserves, often at the brink of exhaustion or depletion.