noun 1.a
hole made by a
rat, as into a room, barn, etc.:
The first chore in the old building is to plug up the ratholes. 2.the burrow or shelter of a
rat.
3.any small and uncomfortable room, office, apartment, etc., especially one that is dirty or disordered: He lives in a rathole near the docks.
Idioms 4.down the rathole, for a worthless purpose or purposes: seeing your inheritance disappear down the rathole.