تعریف و معنای "[chill|shiver] [run] (up|down) {one's} [spine]"

What is the origin of the idiom "chill run up one's spine" and when to use it?

The origin of the idiom "chill run up one's spine" is derived from the physical sensation of feeling a sudden chill or shiver along the spine. This physiological response is often associated with fear, excitement, or a strong emotional reaction. This phrase is used in various contexts and occasions where there is a need to describe a sudden and intense feeling of fear, unease, or emotional impact and finds usage in literature, storytelling, movies, and everyday conversations to evoke a visceral reaction and emphasize the immediacy and intensity of the emotional response.