keep a stiff upper lip
keep a stiff upper lip {v. phr.}
To be brave; face trouble bravely.
He was very much worried about his sick daughter, but he kept a stiff upper lip.
Although he was having some trouble with the engine, the pilot kept a stiff upper lip and landed the plane safely.
Compare: KEEP ONE'S CHIN UP.
Categories:
Source: A Dictionary of American Idioms