on your last legs
US /ɑn yʊər læst lɛɡz/
UK /ɑn yʊər læst lɛɡz/

1.
수명이 다한, 녹초가 된
about to fail, collapse, or die; in a very weak or poor condition
:
•
My old car is really on its last legs; I need to get a new one soon.
내 낡은 차는 정말 수명이 다했어. 곧 새 차를 사야 해.
•
After working for 12 hours, I was completely on my last legs.
12시간 일한 후에 나는 완전히 녹초가 되었다.