Wizarding idioms

Wizarding idioms are expressions that are unique to wizarding culture. However, many of them seem to have analogous Muggle idioms, from which they may have been derived.

List of idioms

 * "Cat among the pixies" - Play on "cat among the pigeons," which is also the name of a Hercule Poirot novel by Agatha Cristie, meaning to do something to cause a lot of people bother or worry. Specifically, Arabella Figg's description of Mundungus Fletcher.
 * "Fell off the back of a broom" - Synonymous with "fell off the back of a truck," meaning stolen merchandise. Mundungus Fletcher leaves his shift of watching over Harry Potter to see to such items, in 1995.
 * "Get off his high hippogriff" - Synonymous with "get off his high horse", meaning to stop being conceited - used by Rita Skeeter to decribe Elphias Doge.
 * "Hold your hippogriffs" - Synonymous with "hold your horses"; a request to wait for an explanation.
 * "Merlin's Beard" - Expression of surprise, synonymous with the Muggle phrase God's blood! Also, Merlin's pants, as exclaimed by Hermione Granger upon the realization that Phineas Nigellus Black could see their location at 12 Grimmauld Place from his portrait. And also Merlin's saggy left... (the rest was unknown) by Ronald Weasley to, and interupted by, his father.