HOLE-IN-THE-WALL - {n. phr.} A small place to live, stay in, or work in; a small, hidden, or inferior place. * /The jewelry store occupied a tiny hole-in-the-wall./ * /When Mr. and Mrs. Green were first married, they lived in a little hole-in-fhe-wall in a cheap apartment building./ 2. {slang}, {citizen's band radio jargon}. A tunnel. * /Let's get through this hole in the wall, then we'll change seats./