It's a bit like a house that's built already and you can just move on in.
I asked a native speaker from North Carolina and he said that the sentence sounded absolutely fine to him. So, it seems like there is nothing wrong with this expression from a grammatical perspective. But I actually couldn't find it in any online dictionary. I don't know about you, but the wording does sound a little bit strange to me. When we say that we're moving on, it usually means that we're going further or progressing in whatever it is that we're doing. However, when we want to say that we've bought a new house and now are going to occupy it, we would just say that we are moving in the house. It seems like this expression is a combination of both. What exactly do you think move on in means and can you explain what is really going here grammatically? And please provide a bunch of similar examples with the exact same wording.