glory hole

(mining) A hole in a mineshaft where an orebody is mined upwards until it breaks through the surface into the open air.

(slang, sexual) A hole in a screen or wall big enough to allow an erect penis to be stuck through, made to facilitate anonymous sex with another person.

(slang) A military trench.

An excavation into the sea floor designed to protect the wellhead equipment installed at the surface of a petroleum well from icebergs or pack ice.

(glassblowing) A hole in the side of a furnace used to heat glass held on a metal rod.

(slang, Scotland and Northern England) A deep built-in cupboard under the eaves or stairs of a house used for general storage, particularly of unrelated or unwanted items stored in some disorder.

A generally untidy place.

The stewards' mess on a passenger liner.

The stokehold on a coal-burning tramp steamer.

A bell-mouth spillway: a spillway (a structure in the reservoir above a dam that allows overflowing water to be released in a controlled fashion) that is shaped like an upside-down bell, thereby giving the appearance of a hole in the surface of the water.

(slang, fishing, Canada) An especially good place to fish, a particularly rich fishing spot.