From Longman Dictionary of Contemporary Englishblack artˌblack ˈart noun [uncountable] (also the black arts [plural]) ROMblack magic
Examples from the Corpus
black art• Promoting a fund has become something of a black art.• Stoking up fear of crime is these rightwing commentators' black art, a fear deliberately inflamed to tip the people rightwards.• And it's a kind of black art anyway - everyone did a bit differently.• We talk too much of black art when we should be talking about art, just art.• They obsess about it, the black art of stealing elections.• He also travels to black art galleries, black bookstores, even a black-owned florist shop. 