to a/the ripe old age
To an especially old age. You won't live to a ripe old age if you keep eating all that junk food! My grandmother on my dad's side lived to the ripe old age of 108.
at/to a ˈripe old age
, at/to the ripe old age of...
at/to a very old age: My grandmother lived to a ripe old age.My uncle was still driving a car at the ripe old age of 89.