IdiomAnimalsEnglish

not turn a hair

Meaning: To show no reaction at all.

Example: “The fire alarm went off and the cat didn't turn a hair.”

Origin: From horses: a horse that has been worked hard shows it in a ruffled, sweat-turned coat, so one that has not turned a hair is entirely unruffled. The phrase is recorded from the 18th century.

Equivalents in other languages

More English idioms

Explore another collection: Proverbs

Short sayings of timeless wisdom from more than 50 cultures, each with its meaning and origin.

Browse all proverbs →

Keep exploring

Explore all idioms →