1. The act of “Fleshing something out” is to add content to an existant framework. Compare borging. To “flesh something out” is to “work something over”, to “fill in the gaps” or “bring to life”. It is a set of actions whose ultimate goal is to make their target useful.
2. Humorously, to be tired of explicit, graphic pornography.
TakeDown.NET -> “Fleshed-Out”