Quantum reptile

From Jenny Everywhere Wiki

The Collective of the Retconning Crocodiles were described as “so-called ‘quantum reptiles’” in the Crew of the Copper-Colored Cupids' Book of Evil. (PROSE: The Book of Evil)

Behind the scenes

“Quantum reptiles” were name-dropped by the Thirteenth Doctor in Never Change, a Doctor Who fanfiction story in the Doctor Who: Be Afraid series by Robert Shepherd, released in December 2018, a little under a year before The Book of Evil.

Oh yes. Snakes in the loo; it’s extremely improbable. But the Neversnake becomes less and less improbable, the closer to its source that you get. By the time you’re as near to it as this, there’s no way it can’t exist. Quantum reptiles. They can be very annoying.
Thirteenth Doctor