scare someone shitless

US /skɛr ˈsʌmˌwʌn ˈʃɪtˌlɛs/
UK /skɛr ˈsʌmˌwʌn ˈʃɪtˌlɛs/
"scare someone shitless" picture
1.

ひどく怯えさせる, 非常に怖がらせる

to frighten someone very badly

:
The sudden loud noise scared me shitless.
突然の大きな音にひどく怯えた
Watching that horror movie last night scared him shitless.
昨夜のホラー映画を見て、彼はひどく怯えた