A
property of certain
items in
NetHack that causes them to move towards a
cursed state when
dropped. That is, if the
item is
blessed,
dropping it will cause it to become
uncursed, and picking it up and dropping it again will cause it to become
cursed.
Loadstones are the most
infamous example. A
scroll of scare monster exhibits similar behavior, but they turn to
dust if picked up while
cursed.
So, to sum up, if you manage to uncurse and finally get rid of a loadstone, don't pick it up again.