Osculum infame is the name of a witch's supposed ritual greeting upon meeting with the Devil. The name means The Shameful Kiss, or The Kiss of Shame since it involved kissing the devil's anus, his other mouth. According to folklore, it was this kiss that allowed the Devil to seduce women.

During the years of the witch hunts, many believed that witches worshipped the Devil and paid him homage by kissing his posterior. The osculum infame is mentioned in nearly every single recorded account of a Witches' Sabbath and in confessions – most of which were extracted under torture. Although most common in Europe, no illustrations of it exist in the publications of English persecutions, possibly as torture was not regularly employed in the questioning of those accused. It was called the kiss of shame because it was generally regarded as an act of degradation.