middle age
The period of a person's life that falls between youth and wishing you would fucking die. For some the line between middle age and old age is very thin. 

Richard Nixon was born middle aged; Madonna achieved middle age when she became irrelevant; Dick Cheney bypassed middle age and went straight to old age as fast as he could get there.
My dad and mom still think they're young, but the sad truth is they hit middle age early in life and won't admit it.