At death’s door

Very near death

 

As pale as a ghost

Extremely pale

 

Bitter pill to swallow

An unpleasant fact that one must accept

 

Get a charley horse

To develop a cramp in the arm or the leg

 

Have one foot in the grave

To be near death

 

Run in the family

To be a common family characteristic

 

Under the weather

Not feeling well

 

Sick and tired of

Extremely annoyed by something that occurs repeatedly

 

Go under the knife

Undergo surgery