WordReference Random House Unabridged Dictionary of American English © 2020
rat•hole (rat′hōl′),USA pronunciation n.
- 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.
- the burrow or shelter of a rat.
- any small and uncomfortable room, office, apartment, etc., esp. one that is dirty or disordered:He lives in a rathole near the docks.
- down the rathole, for a worthless purpose or purposes:seeing your inheritance disappear down the rathole.
- rat + hole 1805–15