You probably do not use sport betting sites that much that is why you haven't heard of those terms or you probably lack gambling conversations because personally they are nothing special as you come across words that are coined every day in conversations. I do not have a list of new words that I have heard or read in this forum but definitely a lot but they aren't special as I said. And as for confusion, I'm never confused because I have Google which I can easily turn to and ask whatever.