scare (one) out of (one's) mind(redirected from scare him out of his mind)
scare (one) out of (one's) mind
To shock or scare one very suddenly or severely. Hyperbolically alludes to frightening one so severely as to cause them to become insane. Don't sneak up on me like that—you scared me out of my mind! That car accident really scared Janet out of her mind. She's still shaken by it.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.