run out of gas
1. Literally, to near the end of one's supply of gas in a car or other vehicle. I'm running out of gas, so we need to stop before we get on the highway.
2. By extension, to lose one's energy, motivation, or enthusiasm to continue doing something. After spending hours working on this project, I'm running out of gas—can we take a break?
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.