a book of names of people liable to censure or punishment.
in someone’s black books, in disfavor with someone.
a book containing the names of people to be punished, blacklisted, etc
(informal) in someone’s black books, out of favour with someone
A list of persons or things out of favor, as in Tom’s in my black book these days . This usage dates from the 14th century and in time became more ominous. In 1536 the agents of King Henry VIII wrote in a black book the names of those to be censured or punished, specifically “sinful” English monasteries (whose lands Henry wanted to acquire). Today being in someone’s black book still signifies being in trouble, at least with that person. Also see black list
Also, little black book. A personal telephone directory listing girlfriends, or, less often, boyfriends. For example, Now that he’s engaged to Ellen, Jim won’t be needing his little black book. [ 1930s ]
A list of measures or facts involved in the unfriendly takeover of one company by another. This usage is employed mainly in business and commerce. [ c. 1980 ]
an American dance, popular in the late 1920s, marked by emphatic, sinuous movements of the hips. noun a dance of the late 1920s that originated in America, involving a sinuous rotation of the hips
a rich pie with a rum- or whiskey-flavored chocolate filling, often with a crust of crushed gingersnaps, and topped with whipped cream. noun Usage Note
any unit that forms part of an electronic circuit and that has its function, but not its components, specified. any comparatively small, usually black, box containing a secret, mysterious, or complex mechanical or electronic device. Aeronautics. an electronic device, such as a flight recorder, that can be removed from an aircraft as a single package. […]
a coarse-grained dark bread, often sour and made from whole-grain rye flour. noun a kind of very dark coarse rye bread