make your hair curl

make (one's) hair curl

To cause one to experience an acute feeling of shame, embarrassment, or discomfort. Her story about the disastrous wedding made everyone's hair curl. The thought of having to give her presentation in front of an audience made her hair curl.
See also: curl, hair, make
Farlex Dictionary of Idioms.

make your hair curl

mainly BRITISH or

curl your hair

mainly AMERICAN
If something makes your hair curl, it makes you very shocked or worried. I could tell you stories that would make your hair curl. Some of the things I read daily would curl your hair.
See also: curl, hair, make
Collins COBUILD Idioms Dictionary, 3rd ed.
See also:
  • make (one's) hair curl
  • make somebody's hair curl
  • make someone's hair curl
  • make someone's toes curl
  • make your toes curl
  • make somebody's toes curl
  • make (one's) toes curl
  • out of curl
  • spare (one's) feelings
  • sparing