Adolf Ludvig Gustav Fredrik Albert Badin, née Couchi, known as Badin, (1747 or 1750 – 1822), was a Swedish court-servant and diarist, originally a slave, butler of first Queen Louisa Ulrika of Prussia and then Princess Sophia Albertine of Sweden. His original name was Couchi, but he was commonly known as Badin, which means mischief-maker or trickster.