Harrpy Potter is full of funny and unforgettable quotes. Mine are...
"Hello Harry, we thought we heard your dulcet tones." - Fred and George Weasley.
"It is our choices, Harry, that show who we truly are, far more than our abilities." - Albus Dumbledore.
"It's lucky it's dark...I haven't blushed so much since Madame Pomfrey told me she liked my new earmuffs." - Dumbledore
"I don't care if my tea leaves spell, Die Ron, Die!, I'm just chucking them in the bin where they belong!" - Ron Weasley
It's a strange thing, but when you are dreading something, and would give anything to slow down time, it has a disobliging habit of speeding up. - JKR
The Song 'Weasley is our King'
From the movies...
"Are you mad?" - Ron, CoS.
"Spiders are telling me to tap-dance." - Ron, PoA
Back to the books...
"Fear of a name only increases fear of the thing itself." - Hermione, CoS
"Make way for the heir of Slytherin, seriously evil wizard coming through..." -Fred and George
"Would you like us to clean out your ears for you?" inquired George, pulling a long and lethal-looking metal instrument from inside one of the Zonko's bags.
"Or any part of your body, really, we're not fussy where we stick this," said Fred.
"I can't see any boils," said Ron, staring at the twins.
"No, well, you wouldn't," said Fred, "they're not in a place we generally display to the public --"
"-- but they make sitting on a broom a right pain in the --"
"You haven't got a letter on yours," George observed. "I suppose she thinks you don't forget your name. But we're not stupid - we know we're called Gred and Forge."
"What are we doing here? Has something gone wrong?"
"Oh no, Ron," came Fred's voice, very sarcastically. "No, this is exactly where we wanted to end up."
"Yeah, we're having the time of our lives here," said George, whose voice sounded muffled, as though he was squashed against the wall.
(Oh, I love the twins!
)
"Well, I can certainly see why we're trying to keep them alive. Who wouldn't want pets that can burn, sting, and bite all at once?" - Draco Malfoy
Speaking quietly so that no one else would hear, Harry told the other two about Snape's sudden, sinister desire to be a Quidditch referee.
"Don't play," said Hermione at once.
"Say you're ill," said Ron.
"Pretend to break your leg," Hermione suggested.
"Really break your leg," said Ron.
"Accio brain!" - Ron, OoTP
"I...must...not...look...like...a...baboon's...backside." - Ron
"Could've been anything," said Ron. "Maybe he [Tom Riddle] got thirty O.W.L.s or saved a teacher from the giant squid. Maybe he murdered Myrtle; that would've done everyone a favor..." - Ron, CoS
"Don't cry, Ginny. We'll send you a Hogwarts toilet seat!" - Twins, PS
There's probably more...I could go on, really. But this post can't get any longer