be in (someone's) black books(redirected from am in their black books)
be in (someone's) black books
To have fallen out of favor with someone. I don't think I'll come to the party on Saturday—I'm in Jenny's black books at the moment.
be in someone's black booksbe in disfavour with someone.
Although a black book was generally an official book in which misdemeanours and their perpetrators were noted down, this phrase perhaps originated in the black-bound book in which evidence of monastic scandals and abuses was recorded by Henry VIII's commissioners in the 1530s, before the suppression of the monasteries.