"Knut for your thoughts?" - (when asking what someone is thinking)

"Raining kneazles and crups." - (like raining cats and dogs... raining a lot)

"Let sleeping dragons lie." - (not to prod or disturb a situation, a play on the Hogwarts school motto)

"Heard it straight from the Abraxan's mouth." - (when you get information straight from the source)

"Let the kneazle out of the bag." - (like letting the cat out of the bag, revealing something that was secret)

"No use crying over spilt potion." - (like no use crying over spilt milk, no point getting upset over what's already happened [I think this one originated in canon?])


*will be back with more probably*