Hammerspace

Hammerspace is a not-so-theoretical pocket dimension wherein large weapons may be stored until needed. In the PPC, these include Hammerspace knives and Agent Kayleigh's mace.

The term originates from a popular anime trope in which characters (almost always female ones) are able to produce ridiculously-sized mallets from seemingly nowhere on command, usually in response to lechery.

Characters who are not canonically supposed to have Hammerspace occasionally develop it because of the author forgetting to mention the presence of an object before it is used. If the object could reasonably be kept within a pocket or be found in the surrounding area, this is not a problem, but the sudden appearance of a large object from nowhere for no apparent reason is a charge. For example, even though Murdoc Niccals is a cartoon character, he does not canonically have the ability to produce shotguns from nowhere, a fact which did not escape the MSTers of Like it or not, in which he inexplicably did so. Nor should characters in the Redwall or Twilight continua be able to pluck their weaponry from thin air, as zain did with his scythe and Tiana did with her "samurai sword".