scare out of one's wits

scare out of one's wits or scare stiff or scare the daylights out of  {v. phr.},  {informal}
To frighten very much.
The owl's hooting scared him out of his wits.
The child was scared stiff in the dentist's chair.
Pete's ghost story scared the daylights out of the smaller boys.
Categories: informal verb
Source: A Dictionary of American Idioms

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