My t uses that term. Well, she actually says "depth work". The way she explained it way back in the beginning was it's like peeling back the layers of an onion... I didn't really understand what she meant back then, but that was 3 years ago, but I understand it a little more gradually over time - it's like, working through all the crap that I have buried my real self under or something. We're getting there, it's very painful sometimes, really enlightening other times, makes me laugh at myself sometimes, I've wanted to rage-quit more than once, there's never a dull moment that's for sure. But I'm committed to the process and seeing it through.