over the hill

over the hill
*over the hill
1. Fig. Inf. escaped from prison or the military. (*Typically: be \over the hill; go \over the hill.) •

Two privates went over the hill last night.

They broke out of jail and went over the hill.

2. Fig. too old (for something). (*Typically: be \over the hill; go \over the hill.) •

You're only fifty! You're not over-thehill yet.

Some people seem over-the-hill at thirty.

* * *
{adj.}, {informal} Past one's prime; unable to function as one used to; senile. * /Poor Mr. Jones is sure not like he used to be; well, he's over the hill./

Dictionary of American idioms. 2013.