Hellavator was created from a K-pop band called Stray Kids. Now, this isn't a real word but the word is used as a term in their song. So supposedly, Hellavator is a elevator that takes you to hell.
Person 1: I'm on a hellavator
Person 2: Ah, the hellavator is taking you to hell
Men whose alcohol tolerance is so low that they are often the first to pass out at parties or any drinking event. However, you are not considered a Hallagan until your face and body is completely covered in permanent marker.