keeping a stiff upper lip

In the week after Diana’s death, a population known for keeping a stiff upper lip grieved in the most public settings.

It’s true that Stoicism is not just about keeping a “stiff upper lip.”

The author pointed out that Diana broke away from the royal family’s practice of keeping a "stiff upper lip."

Kosters is keeping a stiff upper lip.

Even their unrivaled talent at keeping a stiff upper lip is being sorely tested.