shiver down your spine
US /ˈʃɪvər daʊn jʊər spaɪn/
UK /ˈʃɪvər daʊn jʊər spaɪn/

1.
a sensation of cold or fear that causes one to tremble slightly, often associated with a sudden feeling of dread, excitement, or awe
:
•
The ghost story sent a shiver down my spine.
•
The sudden cold wind sent a shiver down her spine.