Greebo

Greebo is a fictional cat in Terry Pratchett's Discworld series. He is best known as the pet of Nanny Ogg, one of the witches who reside in the kingdom of Lancre. Greebo is described as a large, rough-looking tomcat, with a ferocious temperament that can deter most would-be attackers. In the books, he is capable of both aggression and affection, and his behavior often provides both comic relief and moments of surprising loyalty to his owner. Although a cat by species, Greebo frequently plays a role in helping or hindering human characters, and his interactions with witches and other figures contribute to the series' humorous treatment of animal- and personhood.

Greebo has appeared in several Discworld novels across different sub-series, making him one of the more recognizable animal characters in Pratchett's work. The character is often cited by readers for his unexpected depth and for the way Pratchett uses him to subvert typical animal stereotypes.

In popular culture, Greebo is frequently referenced by Discworld fans and has appeared in various adaptations and merchandising related to the Discworld universe. See also Discworld; Nanny Ogg; Witches of Lancre.