"Punching the clock" means working, specifically working as an hourly wage-earner rather than as a salaried executive. It probably comes from the use of mechanical so-called "punch clocks" to keep track of when employees checked in and out of work.
what is origin of the idioum race against the clock
of Punch
"To be" is not an idiom - it's a verb.
No
Mid 1950 competions
Pest is not an idiom. It's a word.
The idiom "apple shiner" means the teacher's pet.
The meaning of the idiom in the pink of health means being in good health.
someone threw a clock out the window
The idiom means impress someone is egg on
It's not an idiom - to cope means to deal with, or to handle
"Old hand" is an idiom meaning having lots of experience.