Keep a Stiff Upper Lip

Meaning:
To be composed and calm in the face of difficult and trying situations.

Example:
She kept a stiff upper lip throughout the funeral.

Did you know?
This expression dates back to the 1800s. When someone gets upset, their lips might tremble. Keeping a stiff upper lip happens when you’re trying not to show that you are upset. This expression is similar to ‘keep your chin up’!