a : something which is formed by casting inside a mold or form: like (1) : a copy (as of a statue) in steel or plaster : casting (2) : a fossil copy of the details of a natural item by mineral infiltration b : an effect taken from an item by using a liquid or plastic material : mold They designed a mask from a wax cast of her experience.
off the depression scrap and junk indicate throwing absent or breaking up as worthless in existent form.
discard implies the allowing go or throwing absent of something that has grown to be worthless or go here superfluous although typically not intrinsically valueless.