little black book

little black book (plural little black books)

1. An address book, especially one in which the details of one's lovers are recorded.

   Synonym: black book

   • 1976, Ben J. Davidson, The official Fonzie scrapbook, Grosset & Dunlap, →ISBN, page 10:

     With a two-volume “little black book” covering some 2,000 chicks, it's an understatement to say that Fonzie has a way with women.

   • 2008, Brenda Jackson, Her Little Black Book, St. Martin's Griffin, →ISBN, page 15:

     This wasn't just any little black book. As far as she was concerned, it was legendary. For years she'd known it existed and had watched Sonya whip it out a few times to make a hit. She had even, on occasion, run into some of the men whose names had been plucked from the book for a date with Sonya. All the men had been tall, dark, and handsome. "Why are you giving me your little black book?" she asked.

• “little black book n.” under “little adj.”, in Green’s Dictionary of Slang, Jonathon Green, 2016–present