one foot in the grave, have
Be close to death or in terrible condition, as in Jane looks as though she has one foot in the grave. This picturesque hyperbolic phrase was first recorded in 1566.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.