Definition
Used to describe someone or something that is very tired, close to exhaustion, or in a state of disrepair.
快累死了；奄奄一息了
After weeks of overtime, he was on his last legs.
經過幾週的加班，他已經筋疲力盡了。
This old car has been running for twenty years, and it's really on its last legs now.
這輛舊車已經開了二十年，現在真的快不行了。
These shoes have been worn for a long time and now they look like they're on their last legs.
這雙鞋已經穿了很久，現在看起來快要壞掉了。