Originally Posted by
the other bob wilson
Out of the ones I mentioned, back in the day and get go have been around long enough for children to hear them and think that they have always been around, therefore they're perfectly legitimate for them to use and they'd be right - I daresay, answering questions with so falls into the same category as well.
However, the three at the bottom of my message (north of, speaks to and moving forward) fascinate me because they're almost exclusively used by adults in my experience - if I had to guess where they originated, I think it may well be in a kind of media speak, because I barely hear them in face to face conversation,