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

1.
assustar pra caramba alguém, morrer de medo
to frighten someone very badly
:
•
The sudden loud noise scared me shitless.
O barulho alto e repentino me assustou pra caramba.
•
Watching that horror movie last night scared him shitless.
Assistir àquele filme de terror ontem à noite o assustou pra caramba.