Not turn a hair

Pro Tip 1/3

Refers to someone's minimal reaction, often unexpected in situations where strong emotions are normal.

The room was in chaos after the announcement, but she did not turn a hair.

Pro Tip 2/3

Implies maintaining composure under stress or amidst disturbing events.

Even as the accusations flew, he did not turn a hair.

Pro Tip 3/3

This phrase is figurative and doesn't involve actual hair movement; it's about emotional steadiness.

Though the earthquake shook the ground, the old man did not turn a hair.