Greebo

infobox Discworld character|

name=Greebo
description=A ball of pure fury in cat shape
associations=Nanny Ogg
location=Lancre
firstseen="Wyrd Sisters"
alsoin="Witches Abroad" "Lords and Ladies" "Maskerade" "Carpe Jugulum" "Wintersmith"
notes=Seen by Nanny Ogg (only) as a sweet, harmless kitten"This article refers to the Discworld character. For the UK subculture term the character is named after, see Grebo"

Greebo is a fictional character in Terry Pratchett's "Discworld" books. He is first introduced in Wyrd Sisters. He is a foul-tempered one-eyed grey tomcat whose human, Nanny Ogg, insists against all the evidence that he is a sweet, harmless kitten. In the course of the books, he has killed two vampires, eating at least one of them in the novel Witches Abroad:

:The bat squirmed under his claw. It seemed to Greebo's small cat brain that it was trying to change its shape, and he wasn't having any of that from a mouse with wings on.

And in Maskerade, Magrat recalls when Greebo once killed an elk.

In " Lords and Ladies", Greebo's overall attitude is best described in an allusion to Schrödinger's cat:

:Greebo had spent an irritating two minutes in that box. Technically, a cat locked in a box may be alive or it may be dead. You never know until you look. In fact, the mere act of opening the box will determine the state of the cat, although in this case there were three determinate states the cat could be in: these being Alive, Dead, and Bloody Furious.

:Shawn dived sideways as Greebo went off like a Claymore mine.

:"Don't worry about him," said Magrat dreamily, as the elf flailed at the maddened cat. "He's just a big softy."

In "Witches Abroad" he was transformed, for reasons that seemed to be a good idea at the time, into a human. He was confused by the differences between human and cat morphology and social relationships, but picked some aspects up quickly. In this incarnation, the character is reminiscent of "Red Dwarf's" Cat; he looks like a 'beautiful, brainless bully' who has raided a leather goods store for the discerning pirate, and appears ready to unbuckle any amount of swash, radiating an aura of raw sex that can be felt several rooms away, and of a Megawatt magnitude. He is typically covered in scars, has retractable nails (or more accurately, claws) and maintains a slitted left eye.

The incident left him with an unstable phenotype, that is, a tendency to temporarily switch forms when completely cornered, which causes some excitement. In "Maskerade" he once more took longer-term human shape, attending the Ankh-Morpork Opera in the guise of the Le Comte de Gribeau.

In a passing reference in "Witches Abroad" Nanny Ogg said that Greebo was a demon ("Just between you and me, he's a fiend from hell"), possibly indicating that Greebo is indeed demonic, partially due to Nanny's insistence otherwise that Greebo is a gentle kitten. In addition to his other qualities, he is pursuing a study in inbreeding with all of the other cats in Lancre that are related to himFact|date=March 2008 (which by dint of some effort is all of them, as he is currently every male ancestor for at least 30 generation), which may be involved in the "raw sex" aura he possesses mentioned above. He has also seriously surprised a she-wolfFact|date=March 2008 (also killed and eaten half of one beforeFact|date=March 2008) and chased a female bear up a tree.Fact|date=March 2008

To date, Greebo is known to fear only three things:
*the Nac Mac FeegleFact|date=March 2008
*the black cockerel Legba, who belongs to the voodoo 'witch' Mrs Gogol. (Although this is more of a mutual respect - as the familiars of powerful witches, neither one is going to admit being scared of the other despite Greebo's claws and teeth and Legba's razor-sharp spurs.)
*'You', a small white kitten owned by Granny Weatherwax. Their first encounter ended with You burying her claws in Greebo's face and his subsequent retreat. He now hides behind the pots and pans whenever she is in the same house as him.Fact|date=March 2008

In Terry Pratchett's Johnny Maxwell series, Mrs. Tachyon owns a cat named Guilty who has many qualities similar to Greebo.