1) Burrow 2) Dilapidated digs 3) Dirty digs 4) Filthy dwelling 5) Filthy quarters 6) Hole 7) Horrible place to live 8) Ignoble digs 9) Lowly digs 10) Mean digs 11) Mean, dark place 12) No place for a neatnik 13) Not a great place to live 14) Road tunnel in Canada 15) Seedy abode 16) Small, nasty home 1) Dump 
A hole in the drilling floor in which the Kelly joint is kept when it is not being used.
1. a hole in the rig floor, 30 to 35 feet (9 to 11 meters) deep, which is lined with casing that projects above the floor and into which the kelly and swivel are placed when hoisting operations are in progress. 2. a hole of a diameter smaller than the main hole and drilled in the bottom of the main hole. v: to reduce the size of the wellbore and drill ahead. ...
Rathole is slang for a disgusting, squalid place.
[n] - a hole (as in the wall of a building) made by rats 2. [n] - (informal) a small dirty uncomfortable room
noun a small dirty uncomfortable room