scare the crap out of (one)

scare the crap out of (one)

rude slang To shock or frighten one very suddenly or severely. Hyperbolically alludes to frightening one so badly as to cause them to lose bowel control. Don't sneak up on me like that—you scared the crap out of me! The sound of the fire alarm scared the crap out of us this morning.
See also: crap, of, out, scare
Farlex Dictionary of Idioms.
See also:
  • frighten/scare somebody out of their wits
  • frighten (one) out of (one's) wits
  • frighten one out of wits
  • drive (one) out of office
  • force (one) out of office
  • force out of office
  • give (one) (one's) head
  • give head
  • give someone their head