scare the (living) daylights out of

US /skɛr ðə ˈlɪvɪŋ ˈdeɪˌlaɪts aʊt əv/
UK /skɛr ðə ˈlɪvɪŋ ˈdeɪˌlaɪts aʊt əv/
"scare the (living) daylights out of" picture
1.

to frighten someone very badly

:
The sudden loud noise scared the living daylights out of me.
That horror movie always scares the daylights out of me.