Order of the Phoenix

'Tell me, how does it feel being second-best to Weasley, Potter?' he [Malfoy] asked.
'Shut up, Malfoy,' said Hermione sharply.
'I seem to have touched a nerve,' said Malfoy, smirking. 'Well, just watch yourself, Potter, because I'll be dogging your footsteps in case you step out of line.'

Hermione: 'Malfoy was being absolutely foul to a first-year back there. I swear I'm going to report him, he's only had his badge three minutes and he's using it to bully people worse than ever…

'Maybe,' said Malfoy in an undertone, so that only Harry could hear him, 'the stupid great oaf's got himself badly injured.'
'Maybe you will if you don't shut up,' said Harry out of the side of his mouth.
'Maybe he's been messing with stuff that's too big for him, if you get my drift.'

'Yes,' came Malfoy's clear drawl front he group nearest them. 'Father was talking to the Minister just a couple of days ago, you know, and it sounds as though the Ministry's really determined to crack down on substandard teaching in this place. So even if that overgrown moron does show up again, he'll probably be sent packing straight away.'

… Malfoy sniggered in a carrying whisper, 'Some people got a "D"? Ha!'

'Yeah, Umbridge gave the Slytherin Quidditch team permission to continue playing straightaway, I went to ask her first thing this morning. Well, it was pretty automatic, I mean, she knows my father really well, he's always popping in and out of the Ministry… it'll be interesting to see whether Gryffindor are allowed to keep playing, won't it?'

'I mean,' said Malfoy, raising his voice a little more, his grey eyes glittering malevolently in Harry and Ron's direction, 'if it's a question of influence with the Ministry, I don't think they've got much chance… from what my father says, they've been looking for an excuse to sack Arthur Weasley for years… and as for Potter… my father says it's a matter of time before the ministry has him carted off to St. Mungo's… apparently they've got a special ward for people whose brains have been addled by magic.'

Malfoy: 'Got your bed booked in the hospital wing, Weasley?'

Malfoy's lyrical talents:
'Weasley cannot save a thing,
He cannot block a single ring,
That's why Slytherins all sing:
Weasley is our King.

'Weasley was born in a bin
He always lets the Quaffle in
Weasley will make sure we win
Weasley is our King.'
…
'Weasley is our King,
Weasley is our King,
He always lets the Quaffle in
Weasley is our King.'

'Saved Weasley's neck, haven't you?' he [Malfoy] said to Harry. 'I've never seen a worse Keeper… but then he was born in a bin… did you like my lyrics, Potter?'

'We wanted to write another couple of verses!' Malfoy called, as Katie and Alicia hugged Harry. 'But we couldn't find rhymes for fat and ugly – we wanted to sing about his mother, see –'

'– we couldn't fit in useless loser either – for his father, you know –'

'– but you like the Weasleys, don't you, Potter?' said Malfoy, sneering. 'Spend holidays there and everything, don't you? Can't see how you stand the stink, but I suppose when you've been dragged up by Muggles, even the Weasley's hovel smells OK –'

'Or perhaps,' said Malfoy, leering as he backed away, 'you can remember what your mother's house stank like, Potter, and Weasley's pigsty reminds you of it –'

To Hagrid: 'And you're sure they're trained, are you?' said Malfoy, the panic in his voice even more pronounced 'Only it wouldn't be the first time you'd brought wild stuff to class, would it?'

To Hagrid: 'What happened to your face, then?' demanded Malfoy.

'Excuse me,' said Malfoy in a sneering voice, 'but what exactly are we supposed to be seeing?'

If anything more was needed to complete Harry's happiness, it was Malfoy, Crabbe and Goyle's reactions. He saw them with their heads together later that afternoon in the library, together with a weedy-looking boy Hermione whispered was called Theodore Nott… Goyle cracked his knuckles threateningly and Malfoy whispered something undoubtedly malevolent to Crabbe.

'Trip Jinx, Potter!' he [Malfoy] said. 'Hey, Professor – PROFESSOR! I've got one!'

'It's him!' she [Umbridge] said jubilantly at the sight of Harry on the floor. 'Excellent, Draco, excellent, oh, very good – fifty points to Slytherin! I'll take him from here…'

Hermione: 'Lording it over all the other teachers, the stupid puffed-up, power-crazy old –'
'Now, do you really want to finish that sentence, Granger?'
…
'Afraid I'm going to have to dock a few point from Gryffindor and Hufflepuff,' he drawled.
'You can't take points from fellow prefects, Malfoy,' said Ernie at once.
'I know prefects can't dock points from each other,' sneered Malfoy. Crabbe and Goyle sniggered. 'But members of the Inquisitional Squad –'
'The what?' said Hermione sharply.
'The Inquisitional Squad, Granger,' said Malfoy, pointing towards a tiny silver 'I' on his robes just beneath his prefect's badge. 'A select group of students who are supportive of the Ministry of Magic, hand-picked by Professor Umbridge. Anyway, members of the
Inquisitional Squad do have the power to dock points… so, Granger, I'll have five from you for being rude about our new Headmistress. Macmillan, five for contradicting me. Five because I don't like you, Potter. Weasley, your shirt's untucked, so I'll have another five for that. Oh yeah, I forgot, you're a Mudblood, Granger, so ten off for that.'
Ron pulled out his wand, but Hermione pushed it away, whispering, 'Don't!' 'Wise move, Granger,' breathed Malfoy. 'New Head, new times… be good now, Potty… Weasel King…'

'Of course, it's not what you now,' he [Malfoy] was heard to tell Crabbe and Goyle loudly outside Potions a few days before the exams were to start, 'it's who you know. Now, Father's been friendly with the head of the Wizarding Examinations Authority for years – old Griselda Marchbanks – we've had her round for dinner and everything…'

Malfoy laughed loudly and sycophantically.

Malfoy glanced around – Harry knew he was checking for signs of teachers – then he looked back at Harry and said in a low voice, 'You're dead, Potter. '
Harry raised his eyebrows. 'Funny' he said, 'you'd think I'd have stopped walking around…'
Malfoy looked angrier than Harry had ever seen him; he felt a kind of detached satisfaction at the sight of his pale, pointed face contorted with rage.
'You're going to pay, ' said Malfoy in a voice barely louder than a whisper. 'I'm going to make you pay for what you've done to my father
…'
'Well, I'm terrified now, ' said Harry sarcastically. 'I s' pose Lord Voldemort's just a warm-up act compared to you three – what's the matter? ' he added, for Malfoy Crabbe and Goyle had all looked stricken at the sound of the name. 'He's a mate of your dad, isn't he? Not scared of him, are you? '
'You think you're such a big man, Potter, ' said Malfoy, advancing now, Crabbe and Goyle flanking him. 'You wait. I'll have you. You can't land my father in prison –'
'I thought I just had,' said Harry.
'The Dementors have left Azkaban," said Malfoy quietly. 'Dad and the others'll be out in no time…'
'Yeah, I expect they will,' said Harry 'Still, at least everyone knows what scumbags they are now –'
Malfoy's hand flew towards his wand, but Harry was too quick for him; he had drawn his own wand before Malfoy's fingers had even entered the pocket of his robes.

Malfoy, Crabbe and Goyle, who had clearly been waiting all week for the opportunity to strike without teacher witnesses, attempted to ambush Harry halfway down the train as he made his way back from the toilet. The attack might have succeeded had it not been for the fact that they unwittingly chose to stage the attack right outside a compartment full of D.A. members, who saw what was happening through the glass and rose as one to rush to Harry's aid. By the time Ernie Macmillan, Hannah Abbott, Susan Bones, Justin Finch-Fletchley, Anthony Goldstein, and Terry Boot had finished using a wide variety of the hexes and jinxes Harry had taught them, Malfoy, Crabbe, and Goyle resembled nothing so much as three gigantic slugs squeezed into Hogwarts uniforms as Harry, Ernie and Justin hoisted them into the luggage rack and left them there to ooze.
'I must say, I'm looking forward to seeing Malfoy's mother's face when he gets off the train,' said Ernie with satisfaction.
'Goyle's mum'll be really pleased, though,' said Ron. 'He's loads better looking now.'