rathole

/R AE1 T HH OW0 L/
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.

  3. 3

    A particularly squalid human residence.

  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

    (of material) to empty only in the center of a hopper or silo, persisting circumferentially.

Source: https://en.wiktionary.org/wiki/rathole