Ron: "I could've taken those mer-idiots any time I wanted."
Hermione: "What were you going to do, snore at them?"

Hermione: "Harry, I've been thinking -- you know what we've got to do, don't you? Straight away, the moment we get back to the castle?"
Harry: "Yeah, give Ron a good kick up the--"
Hermione: "Write to Sirius."

Trelawney: "The fates have informed me that your examination in June will concern the orb, and I am anxious to give you sufficient practice."
Hermione: "Well honestly..."the fates have informed her"...who sets date of the exam? She does! What an amazing prediction!"

"Percy wouldn't recognize a joke if it danced naked in front of him wearing Dobby's tea cozy." -Ron

"Viktor? Hasn't he asked you to call him Vicky yet?" -A very jealous Ron

"Wild! I can make that old bloke down there pick his nose again...and again...and again..." -Ron

"Ah, of course! There is no need to tell me any more, Ms. Granger. Which one of you will be dying this year?" -Prof. McGonagall