useless junk
Random shit that lies around that nobody has any particular use for. Often leading to the phrase "it might come in handy". Potential sign of a closet hoarder.
Mike: Why have you got a load of monopoly pieces without a board?
John: Oh its just some useless junk. It might come in handy some day.
John: Oh its just some useless junk. It might come in handy some day.