shiver (up and) down your spine idiom informal
（因恐惧或兴奋而）脊背发凉，战栗
a frightened or excited feeling
At its most terrifying, his writing sends shivers up and down my spine. 读到他作品中最恐怖的部分时，我不由得脊背发凉。
Whenever I hear that music, I feel a shiver down my spine. 无论何时听到那段音乐，我都会感到一阵战栗。