(as) black as Newgate's knocker 成语
Black as Newgate's knocker
(UK) If things are as black as Newgate's knocker, they are very bad. Newgate was an infamous prison in England, so its door knocker meant trouble.
(as) atramentous as Newgate's knocker
dated Completely black; absolutely after ablaze or color. Refers to the atramentous adamant knocker on the aperture of Newgate Prison in London. Primarily heard in UK. The basement gives me the creeps, it's as atramentous as Newgate's knocker down there!Learn more: black, knocker