Scare (one) silly phrase
If you "scare (one) silly", you make someone very frightened.
Don't shout like that! You've scared me silly.
The horror film scared me silly many times.
I was scared silly when the light went out.
The verb "scare" should be conjugated according to its tense.
This expression alludes to frightening one so severely as to cause them to lose their mind.
Used to describe someone who is naive, gullible, inexperienced, easily fooled, ignorant, unsophisticated, etc.
You don't even know this simple thing? Have you just fell off the turnip truck?