make your hair curl
make (one's) hair curl
To cause someone an acute feeling of shame, embarrassment, or anguish. 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.
make your hair curlmainly BRITISH or
curl your hairmainly 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.