[こしぬかす, koshinukasu](v5s) (1) (See 腰を抜かす) to dislocate one's back; (2) to be unable to stand up due to fear or surprise; to lose one's legs[Add to Longdo]
[こしぬかす, koshinukasu](v5s) (1) (See 腰を抜かす) to dislocate one's back; (2) to be unable to stand up due to fear or surprise; to lose one's legs[Add to Longdo]