thunderbolt

noun

1. a flash of lightning with the accompanying thunder.
2. an imaginary bolt or dart conceived as the material destructive agent cast to earth in a flash of lightning: the thunderbolts of Jove.
3. something very destructive, terrible, severe, sudden, or startling.
4. a person who acts with fury or with sudden and irresistible force.

noun

1. a flash of lightning accompanying thunder
2. the imagined agency of destruction produced by a flash of lightning
3. (in mythology) the destructive weapon wielded by several gods, esp the Greek god ZeusSee also Thor
4. something very startling

n.mid-15c., from thunder (n.) + bolt (n.).