The act of explaining a topic that you have a high familiarity with to someone with no preconceptions of the topic; in a way that they would not understand, unless they already knew about the topic.
Lex: Which way do I go to get to the restaurant, left or right?
Fred: Well, it depends on how you want to go, because it’s all a grid, so it does not matter.
Lex: Don’t road-grid me! I don’t know my way around, just tell me the direction!