What word or phrase does your mother always say?
goose bumps pl.n.
Momentary roughness of the skin caused by erection of the papillae in response to cold or fear. Also called cutis anserina, goose flesh, goose pimples.
A roughness of the skin or the production of small pimples on the skin as the result of fear, cold, or excitement; gooseflesh ( first form 1930s+, second 1914+)