n. An entrance to a living area or passageway used by mice or rats.n. A living area used by mice or rats.n. A particularly squalid human residence.n. An area of a silo that has undergone ratholing, so that material moves mostly through the centre and accumulates around the edges.v. to hoard.v. to take a conversation off topic, especially in technical meetings.v. to surreptitiously or prematurely remove chips during a poker game.v. (of material) to empty only in the center of a hopper or silo, persisting circumferentially.