Hello Renato! This expression is just saying that something was extremely scary for the speaker. This expression is considered blasphemous by Christians as "bejeesus" is a way of referring to Jesus in a derogatory way. So to avoid offending people I would rather say it like this: "Scare the daylights out of..." or "Scare the living daylights out of..." which also mean an experience that was extremely scary. For example: Are you trying to "scare the daylights out" of me by wearing that mask? or You almost "scared the living daylights" out of me by sneaking up on me like that! I hope that helps!

Hello, again Renato! This forum is to ask any kind of question - as the saying goes "there are no silly (or simple) questions...." So please ask all you want!

Can't say where it came from, but it means to really scare someone

Professor Google can help you with simple questions. English teachers can help you with grammar questions.