hole in the wallhole in the wall
hole in the wall
nounpl. holes in the wall
(plural hole-in-the-walls or holes-in-the-wall)
Although either plural can be used for both meanings, hole-in-the-walls tends to be most commonly used for the "obscure place" sense, and holes-in-the-wall is more frequently used to mean "automated teller machines".
The British sense of an automated teller machine is a trademark of Barclays.