make someone's hair stand on end

US /meɪk ˈsʌm.wʌnz her stænd ɑːn end/
UK /meɪk ˈsʌm.wʌnz her stænd ɑːn end/
"make someone's hair stand on end" picture
1.

to frighten someone very much

:
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The ghost story really made my hair stand on end.
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The sudden scream made her hair stand on end.