back alley noun 2back-alley adjective 1forms 1 noun2 •An alleyway that runs behind a row of houses, or between rows of houses. •(slang, euphemistic) The anus.Nobody goes up my back alley without a rubber on and I don't do heroin, so what's the worry? — 1991 back-alley adjective1 •Occurring away from publicity, or in mean surroundings; backstreet. formsback alleys
