|1.||one foot in the grave|
Description of a person who is elderly or very ill and presumably near death. Not particularly respectful, but usually used comically.
Also used with the addition of "one foot in the grave and the other one on a banana peel."
Petie's cat was 18 years old, and while he didn't want to admit it, Petie realized that Tabby had one foot in the grave and the other one on a banana peel.