sudden severe lower back pain; strained back
Colloquial, often humorous idiom for acute lower back pain that strikes suddenly, as if struck by a witch. Compare ぎっくり腰, which is the more clinical term.
See also: ぎっくり腰
When I woke up, I was hit by a sudden back pain and couldn't move.
The moment I sneezed, a sharp pain shot through my lower back.
The standard medical/clinical term for acute lower back strain. 魔女の一撃 is a more colorful, colloquial synonym.
A translation of German Hexenschuss, literally “witch’s shot,” a colloquial name for sudden severe lower-back pain.