Sentence examples for kill you from inspiring English sources

"kill you" is not correct and usable in written English
The phrase is too informal, and even in informal spoken English it should be used with caution. If you are writing something informal (such as a text message or an email to a close friend), the phrase can be used, provided it is not meant to be taken literally. For example: "I'm so mad at you right now, I could kill you!"