on one’s last legs

on (one's) last legs

Near physical collapse or death. I knew I was on my last legs, so I was very relieved to see the marathon's finish line in the distance. Ed's on his last legs—you should probably try to visit him in the hospital today.
See also: last, leg, on
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

on one’s last legs

and on its last legs
mod. about to expire or become nonfunctional. This car is on its last legs. We have to get a new one.
See also: last, leg, on
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
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