'That's completely mental.'

[Arrow-Arton]

AHHH!!! I had a good one.... Oh ya -jumps up and down-

HBP:

(in first DADA class)

"Do you remeber me telling you we are practicing non-verbal spells Potter?"

"Yes." said Harry stiffly

"Yes sir."

"There's no need to call me "sir" Professor."

-Harry and Severus Snape.

I love this one heh  

[miti_mouse]

I've got a couple too.

"Someone can't feel all that at once...they'd explode!"
"Just because you have the emotional capasity of a teaspoon Ron doesn't mean that we all do!" (Book)

"Oh God man, you're not still on about that bloddy dragon? You're goin' into the forest after all...got to 'ave your wits about ya" (Movie)

"Used to be that detention was spent with you shackeled by your thumbs in the dungeons...God I miss the screamin'" (movie)

"Just because you've never snogged anyone..."
"I have so!"
"Aww been practicin' on Pigwiggon have you? Or got a picture of Aut Millie stached under your pillow?" (Book)

"The incident down in the dugeon between you and Proffesser Quirl is a complete secret...so...naturally...the whole school knows!" (Book and movie)

"And please don't blow up a tiolet!"
"We've never blown up a toilet"
"Yea, but thanks for the idea mum."
"Don't worry, Ginny...we'll send ya a toilet seat." (Book)

All I can think of right now...  

[Crisp n Tangy]

In the first book when Ron and Harry are in the devil's snare:
"Devil's Snare, Devil's Snare ... What did Professer Sprout say? It likes the dark and the damp -"
"So light a fire!" Harry choked.
"Yes- of course- but there's no wood!" Hermione cried.
"HAVE YOU GONE MAD?" Ron bellowed. "ARE YOU A WITCH OR NOT?"  

[elwine]

Sakura_kura

'The spiders, the spiders! They want me to tap dance! The spiders want me to tap dance, I dont' want to tap dance!'

'You tell them Ron!'

Favorite set of lines, right there. xD

I agree.

And I like the one in the first movie with the devil's snare:
Ron after he gets out of it: Well, I'm glad no one panicked.

XD  

[Sakura_kura]

Moonyest

AHHH!!! I had a good one.... Oh ya -jumps up and down-

HBP:

(in first DADA class)

"Do you remeber me telling you we are practicing non-verbal spells Potter?"

"Yes." said Harry stiffly

"Yes sir."

"There's no need to call me "sir" Professor."

-Harry and Severus Snape.

I love this one heh

AHAHAH! That's great!  

[batmannings]

I love so many!

...Oh here's one...

Lucky it's dark, I havn't blushed this much since Madam Pomfrey told me she liked my new earmuffs.
-Dumbldore  

[Mistress Miyako]

Mr. Weasly: Feet off the table
Fred and George together: Feet off the table

I liked that part but i can't remember the rest.  

[DoktorJackal]

This isn't from the book or movie but any one who's watch Harry Potter Pupet Pals will know why this is so funny

-sung-"Following the butterfly's following the butterflys." Ron
"Ronicus Exploadicus!" Hermione