If I'm getting a hair cut and I ask them for a regular, would that mean they're giving me a zero
well if you never got your hair cut in that hairdressers before they might ask you what is your usual, so it could be just as well if you give them some detail on what style you want
That doesn't even make sense
No . Zero means zero degree translated in the beauty industry means cutting the hair with or without tensions while it's lying flat on your nape (neck). Ex a blunt bob.