What is the meaning of Rathole?

An entrance to a living area or passageway used by mice or rats.

A living area used by mice or rats, or a similar living area used by other animals.

A particularly squalid human residence or other place.

An area of a silo that has undergone ratholing, so that material moves mostly through the centre and accumulates around the edges.

A pigeonhole.

To hoard.

To take a conversation off topic, especially in technical meetings.

To surreptitiously or prematurely remove chips during a poker game.

To exit a cash game and re-enter with a smaller stack.

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

Source: wiktionary.org