rathole

Short definition from Wiktionary

Noun

1. 1
   An entrance to a living area or passageway used by mice or rats.
2. 2
   A living area used by mice or rats, or a similar living area used by other animals.
3. 3
   A particularly squalid human residence or other place.
4. 4
   An area of a silo that has undergone ratholing, so that material moves mostly through the centre and accumulates around the edges.
5. 5
   A pigeonhole.

Verb

1. 1
   To hoard.
2. 2
   To take a conversation off topic, especially in technical meetings.
3. 3
   To surreptitiously or prematurely remove chips during a poker game.
4. 4
   To exit a cash game and re-enter with a smaller stack.
5. 5
   (of material) To empty only in the center of a hopper or silo, persisting circumferentially.