be on in years(redirected from am on in years)
be on in years
To be advanced or advancing in age; to be old or aging. I might be a little bit on in years, but I'm no fool when it comes to technology! Your grandfather's on in years, so you may need to speak a bit more loudly around him.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.