Something that is totally at home (a bird's nest). Something that is very well thought out and fits perfectly; reference to Adobe Flash (and OOPs programming in general) movieclips where one top level object contains several others, these objects are said to be nested.
That idea is well nested!
by Garry Samett November 04, 2007
putting toilet paper down on a public toilet seat before you put your bare ass on the seat
Before sitting on a public toilet I Nested
by Jimmy poo September 05, 2015