An excessively large or thick makeshift
toilet seat cover constructed from very many interleaved strips of toilet paper placed around the seat rim. So called because of the resemblance to the nest of a very large bird.
Created by persons using a public toilet who cannot bear to have their buttocks touch the seat when a disposable cover is not available, or though to be too small, thin or flimsy to be effective.
Usually seen by others when the creator leaves the
construction un-flushed and in-place on the seat after departing the
public restroom.