It's an awful explanation that assumes that you are the same person in all situations. When no one acts like that.
Normally it gets referred to by "hats" or "masks", depending on the connotation.
Combine that with the basics of using fashion and body language to hide.
It's not that complex, and makes more sense than people trying to suggest that someone acts the same all the time.
Imagine suggesting that you act the same way around your family, coworkers, friends, and random strangers. You would be surrounded by people who don't like you, because you have no boundaries.