Question

Over the Hill past one's prime; unable to function as one used to; too old

Accepted Answer

A ninety-two-year-old man finished the marathon and proved he wasn't over the hill yet. Since at least the middle of the 20th century, writers have made comparisons between living your life and climbing a hill or mountain. When you're young and full of energy, you climb up the hill and head for the top. After that, as you come upon middle and old age, your body slows and you go down the hill, no longer able to do all the things you could do before. You're "over (the top of) the hill." But some old-timers would say, "I'd rather be over the hill than under it."

Idiom	Over the Hill
Example	A ninety-two-year-old man finished the marathon and proved he wasn't over the hill yet.
Meaning	past one's prime; unable to function as one used to; too old
Origin	Since at least the middle of the 20th century, writers have made comparisons between living your life and climbing a hill or mountain. When you're young and full of energy, you climb up the hill and head for the top. After that, as you come upon middle and old age, your body slows and you go down the hill, no longer able to do all the things you could do before. You're "over (the top of) the hill." But some old-timers would say, "I'd rather be over the hill than under it."

Hill Middle Ninety Two Year Old Man Finished Marathon Proved Past