Definition of make someone's hair curl in English:

make someone's hair curl

phrase

informal
  • Shock or horrify someone.

    ‘she drives at a speed to make your hair curl’
    • ‘There are things going in in this world that make your hair curl.’
    • ‘Some of the bad guys there did things that would probably make even your hair curl - and I don't even want to give you any ideas.’
    • ‘Whatever your politics, it will make your hair curl.’
    • ‘The last information he had received was from survivors, and it was horrifying, that it would make a man 's hair curl.’
    • ‘The string of expletives that then emitted from the phone would make you hair curl.’
    shock, stun, horrify, appal, scandalize, make someone's blood run cold
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