scare someone shitless
US /skɛr ˈsʌmˌwʌn ˈʃɪtˌlɛs/
UK /skɛr ˈsʌmˌwʌn ˈʃɪtˌlɛs/

1.
把某人嚇壞了, 把某人嚇得屁滾尿流
to frighten someone very badly
:
•
The sudden loud noise scared me shitless.
突如其來的巨響把我嚇壞了。
•
Watching that horror movie last night scared him shitless.
昨晚看那部恐怖電影把他嚇壞了。