Yes, Fuzzy, I do use that phrase, and have used it to good effect ever since my old therapist recommended it to me.
You see, I'm not a people person, and throughout my life have had terrible problems getting along with people. So one day during a session, I asked her, "Ruth, if you could give me one piece of advice that would help me relate to other people, what would it be?"
So guess what she said? "Fake it till you make it." And she, being a minister's daughter, had beaucoup experience dealing with people of all makes and models, in all types of situations. And she, unlike me, loves people.
Hope that helps. It helped me.