noun. The bristling of the body hair, as from fear or cold; goose bumps.
Also a musical genre which draws wide dark emotional elements from horror films, gothic music, industrial music, heavy metal music, and/or ambient music/dark ambient. Horripilation music is always centered around the attempt to make the listener generally experience dread, fear, terror, and/or horror. Its sound often involves feelings of intrusion from an evil force, fear of the mysterious, event or personage, sometimes of supernatural origin, on the mundane world and the consequences thereof. [Wikipedia]