(US, conspiracy theories) A secret covert government helicopter of the deep state, used for clandestine missions, such as UFO cover-ups or capturing political prisoners.

plural of black gangster

(television) An analogue composite video signal with a black picture, used as a reference signal to synchronise timings.

(London) a black cab, a taxi that is only hailed from the street / (New York City) a taxi that cannot be hailed from the street, but is called by placing a phone-in request; a call cab, a radio taxi

A Christmas Day or Christmas Eve on which there is not any snowfall or ground covering of snow.

plural of black bun

(politics, historical, derogatory) propaganda term used by Mao Zedong against opponents / Used other than figuratively or idiomatically: see black, gangster. (i.e. one with black skin)

Synonym of witches' Sabbath (“meeting of witches”)

plural of black Sabbath

Used other than figuratively or idiomatically: see black, supremacy. / The ideology which holds that the black race is superior to all others.