fright wig

noun1

1. •
   A wig, usually worn for humorous or novelty effect, having voluminous, frizzy, long hair, suggesting the hair "standing on end" of a person who is extremely frightened or who has experienced a powerful electric shock.

   • There's an awfulness about the voice of a blood-maddened club-swingin' mob; it lifts your scalp like a fright wig, particularly if you are the clubee. — 1920