not turn a hair

Meaning

1. to show no emotion when sth surprising, shocking, etc. happens

In the movies · 3

• But he positively assured me it'd turn my hair a beautiful raven black.Anne of Green Gables1985
• Talking to Mr. Marshall here, he tells me those Soviets are doing things with submarines that will turn your hair white.No Way Out1987
• Leslie hasn't turned a hair.The Letter1940

Learn it in full scenes

• The Letter1940
  • Leslie Confesses After the Shooting
  • Leslie Recounts the Night Hammond Died
  • Leslie Describes Shooting Hammond

From the same entry

• get in hair
• the hair of the dog
• keep your hair on
• let your hair down
• make hair stand on end
• not harm a hair of head
• not have a hair out of place
• hang by a hair
• not see hide nor hair of
• split hairs
• tear your hair